Windows 7 USB not working when using KVM


  • Hi everybody,

    I just installed Windows 7 Professional (64bit) on my Computer. The Computer is connected to a Belkin Switch 2 KVM using USB keyboard and mouse. Everything worked fine. When I use the KVM to switch to my Laptop everything is ok, but if I try to switch back to the Windows 7 PC only the monitor works. The USB keyboard and mouse do not work until I reboot the computer. It worked fine using the same hardware and Vista, so I suppose it is a USB Problem within Windows 7. If anyone has an idea how to solve this, this would be great.


    Wednesday, November 04, 2009 6:28 PM


  • Hi,


    You may check if your switch is compatible with Windows 7 from the Windows 7 Compatible Center. You may also refer to Belkin Website to search for the firmware update and contact their support for the compatibility information.


    If they make sure this model of switch is fully compatible with Windows 7, you can update the BIOS and motherboard drivers first.  


    If it does not work, I suggest you test the issue in Clean Boot.


    Good luck!


    Arthur Li - MSFT
    Thursday, November 05, 2009 7:35 AM

All replies

  • Hi,


    You may check if your switch is compatible with Windows 7 from the Windows 7 Compatible Center. You may also refer to Belkin Website to search for the firmware update and contact their support for the compatibility information.


    If they make sure this model of switch is fully compatible with Windows 7, you can update the BIOS and motherboard drivers first.  


    If it does not work, I suggest you test the issue in Clean Boot.


    Good luck!


    Arthur Li - MSFT
    Thursday, November 05, 2009 7:35 AM
  • I'm having a similar issue.  I'm using Belkin's F1DL102U (v1.1) KVM switch.  I've been using this KVM switching XP/XP and XP/Vista with no problems.  I just upgraded to Windows 7 (64bit) and my keyboard doesn't work after switching from the XP machine to the Win7 machine (when I switch back to the XP machine, it works just fine again).  Unlike your issue, my mouse still works fine.  I have my XP machine connected directly into my monitor's VGA connection and my Win7 machine into the DVI connection, so I am not switching the monitor via the KVM.  When I boot up the Win7 machine, the keyboard works just fine, but once I switch away and back, no deal.

    So it's not just you, Steven.

    Sunday, November 08, 2009 11:48 PM
  • Same issue here, i have an Avocent DVI 2port KVM, using a G15 keyboard and a Gx1000 Lazer mouse (both logitech). I am using the USB "hub" that is built into the KVM because it fully supports the mouse and keyboards special features where as the 2 usb ports for keyboard/mouse do not on the switch. It always worked fine with Win 2k and Winxp, but now with Win7 when i switch back and forth keyboard stops working, but the mouse keeps working. I have noticed if i wait at the win7 system for a minute it pops up saying USB device has malfunctions and/or is not recognized.  Also if i unplug and plug the keyboard back into the KVM the issue clears up (untill i switch again) and i can use the keyboard, however if i unplug the USB cable going from the KVM to the computer the issues does NOT clear up.

    I suspect it is some bad communications between the Avocent and Win7, but i am not sure what, i know win7 is doing something, but that does not mean that avocent couldn't put out afirmware to correct the issue. There is no new firmware YET for the KVM.

    btw same version of Win7 64bit release version (installed just a couple days after release)
    Thursday, November 12, 2009 8:44 AM
  • Same problem with Win 7 x64 and Belkin's F1DL102U
    Saturday, December 19, 2009 4:40 PM
  • I still have yet to figure out a solution to this, but i am 99.9% sure it is Microsoft's issue and a Windows 7 issue, i tested the KVM again with a 2k machine and a xp machine worked fine.. and then with 2 XP machines, and they worked fine... I refused to use Vista so i do not know if this issue existed under that OS. I keep hoping someone will stumble across this thread and have an answer/solution it is frustrating to have to unplug and replug the keyboard into the KVM 80% to 90% of the time when i switch computers.. every ONCE in awhile it works and actually detects the keyboard when switched back.. otherwise it just throws up a USB device not recognized error..
    Thursday, December 24, 2009 9:27 AM
  • It had been tested and proofed in many cases.  The issues was not caused by Windows 7 but the KVM switch which did not support full-time USB emulation or device mapping to connected Windows 7 systems. 

    In order to sharing more "smart" USB devices (such as Multi-touch touch-screen display, gaming mouse/keyboard, Wacom tablets or other tablets ...etc.), Windows 7 requests and checks the USB connection status frequently.  So, if your KVM switch did not support  function , so called Dynamic Device Mapping (DDM), then you will not having problems with USB mouse/USB keyboard not work/found issue.   

    I tested a special version of KVM switches at my labs and found those DDM-embeded switch did solve the problems most Windows 7+KVM users experienced - USB HID devices (not limited to just USB keyboard and USB mouse) not working with KVM switch. 

    Please check the link:

    • Proposed as answer by KVM PRO Friday, December 02, 2011 1:45 AM
    Sunday, January 24, 2010 1:35 AM
  • Microsoft is not responsible for hardware manufacturers to develop hardware to be compatible with their operating system and leave it to them to supply the firmware and drivers to make their equipment compatible. So look at the OEM's website or complain to them. My Belkin dual console 8 port switches worked fine with the firmware upgrade.
    MCSE, MCSA, MCDST [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]
    Sunday, January 24, 2010 8:05 AM
  • ummm wait... so Windows 7 did not cause the issue except it never happened under any other operating system except Windows 7?? I some how suspect that there IS a connection there, albeit may simply be windows 7 implementing new technology that we as end users can't disable therefor nullifying many many current KVM implementations.

    I still have yet to find a resolution to this issue, besides the constant call from microsoft and even other end users to "buy a new kvm", which if you wish to mail me a nice new one that supports DVI 1080P resolutions i would be more than happy to accept it, otherwise i am just disappointed in Microsoft and the response of "get new hardware" which seems to be a cop out *chuckle*.

    Wednesday, January 27, 2010 5:51 AM
  • I have the same problem as the others posting on this thread.
    I too had the exact same setup working with WinXP.
    The weird thing is, once the mouse and/or keyboard randomly stop working with Windows7, I cannot connect any other mouse or peripheral.
    It seems like the USB controller is messed up and not properly reset by Windows 7.

    I would like to reiterate, this is not a hardware problem and never had it prior to installing Windows 7 (x64).
    When I switch back to WinXP, it works perfectly.
    Wednesday, January 27, 2010 3:33 PM
  • Hi Steven,

    I realize that a lot of time has passed since you originally posted this, however I too have recently experienced the same issue with the Belkin switch2.
    I have a windows 7 64bit desktop and a windows 7 32bit laptop. - when switching to and from the laptop everything remained to function without any problems, but the desktop did the exact same thing as you have seen.  I (at first) put this down to a difference in the 64bit version of windows 7. 

    After numerous restarts, I realized that my laptop could be fine as there is a mouse and keyboard attached at all times (as it's a laptop), I decided to find an old USB mouse I had lying around, and plug it directly into my desktop PC.  After switching to and from it the mouse and keyboard attached to the switch2 continued to work, I assume this is due to there always being a mouse present and functional?

    I know this is not a solution per say, but perhaps worth a try, a cheap USB mouse to potentially fix those hours of annoyance!

    Let me know how you get on (if you have not already sorted something)


    Chris Blyth

    • Proposed as answer by BlythMeister Thursday, February 04, 2010 10:05 AM
    Thursday, February 04, 2010 10:04 AM
  • Hi Chris,

    This really looks interesting. Unfortunately this did not work for me. I only found an USB mouse, so I used this mouse and an old PS2 keyboard. Again, switching from the Win7 64 bit to the Vista worked, but the opposite direction did not. One interesting aspect is that after I switch back to Win7 the additional USB mouse does not work as well, even if I unplug it and plug it in again. So at the moment I see no option to get it to work. It might be that Windows 7 is working according to standards, but it still is the only OS I know not working with the switch. Of course the problem could be solved by buying a new KVM compatible with Win7, but this is an answer I would have found without posting to a forum ;)

    Anyway thanks for the idea, sadly it did not work for me. So it seems I will have to buy a new KVM, which the I guess will not work with the next version of windows ;)



    Friday, February 05, 2010 10:58 AM
  • You sir, are a genius! I have agonized for hours on this problem, with countless reboots. My problem was BOTH the mouse and keyboard. In my case both Win 7 and XP worked fine through my Belkin Flip, UNTIL an handfull of automated hotfixes ran on Oct 15 2010. Since then, Win 7 was OK, XP no keyboard or mouse (even if I booted while active on the KVM).


    I just hooked up wired cheapy keyboard and mouse directly to the XP box, and now my wireless keyboard and mouse work through the KVM.


    Friday, October 22, 2010 1:33 PM
  • Wow, that is a great workaround!  This issue has been *really* bothering me for about 4 months since I bought Windows 7.  Every few times I would switch to my other computer on the KVM and then switch back to Windows 7, it would behave like this.  My mouse would still respond but it was extremely sluggish as if the computer was running at 100% cpu and there wasn't enough horsepower left to deal with the mouse etc.  Everything became extremely slow and unresponsive at times. 

    Now, when I plug in another keyboard and mouse and leave those off to the side, my main keyboard/mouse (ie. the one through the KVM) continues to be responsive, which is really great.  Now I don't have to reboot every time this happens!




    Tuesday, December 07, 2010 5:56 PM
  • Ray, I see that you use another set of Keyboard and mouse connected directly to the the Windows 7 system to prevent the keyboard and mouse of your KVM switch from mis-behaving.  However, this solution seemed to defeat the purpose of having a KVM switch.

    There are three kinds of USB KVM switches in the market now.  All the cases we discussed here are either using "USB-Hub" based KVM switch or "Emulated-USB" based KVM switch.  The only reason these two kinds of USB switches caused the shared keyboard or mouse mis-behaving or compatible is that both types cause HPD (Hot-Plug Detection) error when switching between/among share channels/systems.

    The other type of USB KVM switch technologies is USB Dynamic Device Mapping (DDM) switch - which is the only type of KVM switch does not cause HPD error when switching.

    As not just regular keyboard or mouse will be shared, the demands of having DDM type USB KVM switch will be getting stronger. 





    Thursday, December 16, 2010 10:45 PM
  • I have the same problem. I had a Dell Dimension 4600 desktop with Windows 7 32 bit and a Dell Latitude D430 laptop also with Windows 7 32 bit. My Belkin KVM F1DK-102U worked fine.

    I swapped the desktop for a Dell XPS 7100 with Windows 7 64 bit and now the switch wont go back to it.

    Its fine at boot but if you switch to the laptop (works fine) and then switch back to the XPS the mouse and keyboard dont work. The monitor does work.

    I tried disabling USB Selective Suspend to no avail.

    Help please - whats different in 64 bit?


    Thursday, December 23, 2010 12:33 PM
  • Simon,

    What USB keyboard and mouse you're using with this setup ?

    All hardware devices need 64-bit drivers to work on a 64-bit version of Windows . Drivers designed for 32-bit versions of Windows don't work on computers running 64-bit versions of Windows .

    You may want to check if the keyboard and mouse you use having /need 64-bit version drivers.


    Friday, December 24, 2010 5:44 AM
  • Hello

    My problem is somehow similar but there are some more weird things added.

    In my case I was switching between a XP 32 bit laptop and a XP 32 bit desktop and everything worked ok. Then I upgraded my desktop with Windows 7 64 bit (two weeks ago) and everything kept working fine for one week until today.

    Today things are mixed up: My monitor shows the laptop screen while the mouse and keyboard control the desktop, when I switch, then the monitor shows the desktop screen while the mouse and keyboard control the laptop. Yes, this is very weird and have not changed any of the existing connections since last time when this was working perfectly (just installed some programs and added some printers in the last day).

    Any suggestion would be welcomed.

    By the way is there any firmware update available for this belking switch2?



    Saturday, December 25, 2010 6:59 PM
  • Yeah I know the thread is old, but what the heck, maybe someone is still subscribed to it.


    Same issue: KVMs (3 different ones) worked fine until Win7ult 64 bit.

    So I went out and bought a US$200 IOgear USB DDM, DVI 4 port switch.  Active emulation of everything.

    Check out this behavior:

    The Macintosh works great even with a Microsoft Ergonomic 4000 keyboard until Intellitype 8.2!  So I think that PROVES the KVM is doing its job.  Switch back and forth... Long time off the mac then come back.. YEP it still works.

    But the Windoze 7 x 64 machine... Works on boot up for about 10 seconds, until Win7 tries to install the driver for the device, which it fails at, then the keyboard and the Logitech trackman marble go dead.

    If I could find a way to STOP Win7 from trying to install drivers for the devices I think they would be fine under generic minimal support after all THEY WORK UNTIL WINDOWS TRIES TO INSTALL DRIVERS - Which then fraks it all up.

    So MS, don't try to tell us that it isn't Win7.

    Friday, December 30, 2011 11:05 PM
  • JasksonDigitalTech,

    I think you were wrong with the IOgear USB KVM switch.   IOgear does not have any KVM switch with USB DDM technology.

    The USB DDM switches are only found with ConnectPRO or June-On technology's KVM switch lines.   "USB DDM  (Dynamic Device Mapping)" is patented technology worldwide to solve the USB devices re-sync issues with new OS such as Windows 7 and some Linux releases.

    IOgear's KVM switches do not have USB DDM technology built-in.



    Wednesday, January 04, 2012 8:30 PM
  • I had the same issue with Windows 7 64bit.  The only way i could resolve it was to use USB 1 for my keyboard and mouse.  An easy way to do this (rather then plugging in to the front of the computer) is to use a an old USB 1 (2) port hub and plug it into the back of your PC in the USB 2.0 slot.
    Tuesday, July 17, 2012 1:39 AM
  • I believe that there are a firmware upgrade to solve the boot up login issue with your DDM switch.

    Please give your model number and serial number of the DDM switch and the maker should know which firmware version should be given to you.


    Saturday, November 03, 2012 8:17 PM
  • I plugged an old ps2 mouse through a ps/2 to usb coverter into the usb port and that seems to keep the computer convinced that the mouse is still plugged in when the KVM switch is toggled.

    I had to reboot the first time to get it all to work and register but it has been flawless.  was bugging the crap out of me.

    thanks for the suggestion above.

    Tuesday, December 04, 2012 3:16 AM
  • I have a similar issue, and a possible work-around.

    My KVM is a Belkin F1DS104T SOHO Series 4-Port KVM (USB & PS/2). The physical keyboard & mouse are PS/2, but connection to my new laptop docking station has to be via the KVM USB ports as there are no legacy PS/2 ports on the docking station. The laptop runs Win7 64 bit.

    As others have reported, when you switch away from Win7 and back again, the mouse stops working properly. The mouse pointer continues to move, but most things cannot be clicked on (the taskbar is one example - eg hover over the system tray icons and they do not highlight and clicking has no effect). Initially I thought the computer had locked up or frozen, but that's not the case.

    I have noticed that if you press CTRL+ALT+DEL, then click the left mouse button, then click on the "Cancel" button on screen, the desktop will return and both the keyboard & mouse behave normally again. However sometimes when switching back, the system registers a bogus mouse click (or possibly keyboard press) which can have unwanted effects (it tends to close the window with the focus, or press a browser "back" button).

    Therefore my work-around is to lock the machine (via CTRL+ALT+DEL, click on "Lock this computer") before switching away. The mouse and keyboard will respond normally on return, and any bogus clicks / key-presses are not seen by the applications). You can just log back in and carry on working.


    Monday, March 04, 2013 9:25 PM
  • I have experienced the same issue with a Dell E6400 series laptop (Windows 7 Pro 32-bit issued by employer) and my home KVM setup - a Belkin OmniCube 4-port PS/2 + VGA certified for Windows NT/98.  The unit works with all my existing machines, including Windows XP Home SP3 (ASUS Celeron), Red Hat Linux, Debian Linux, and Windows 98 SE (multi-boot off a ASUS AMD machine) and my Windows XP Home SP3 laptop (Gateway MX6436).  I suspect it is related to USB DDM.  I have a Microsoft PS/2 ergonomic keyboard and male PS/2 mouse plugged into the KVM.

    Testing this issue, I ran through all the devices in the signal chain - the keyboard, mouse, y-adapter for USB-to-PS/2, and the KVM itself.  It turns out, keyboard-mouse functionality returns after swapping both the keyboard and mouse simultaneously for another set of different manufacturer.  At first I thought my original keyboard/mouse combo (Radio Shack) were failing or non-compliant, but after swapping them back in after the Microsoft keyboard-mouse combo, it appears the swapping of the units forces Windows 7 to reconnect.

    So, the KVM isn't currently responding to DDM, but it wasn't really designed to.  For Microsoft to say that it's the device's fault, when every other OS is playing nice, is disingenuous and passing the buck.  There needs to be a registry hack to have Windows 7 work with this legacy hardware.  KVM switches are expensive, and it's unreasonable for Windows 7 to be the only outlier.

    This issue has cost me and or my employer probably a full work-week in total productivity loss so far, and it's affecting my ability to work from home, since a KVM dual-monitor setup is key to the type of work I do.

    So far, my only workaround is to continue to swap keyboard/mouse when the keyboard/mouse functionality disappears, or else hack the registry to show hidden disabled USB connections in the Device Manager and delete those, restart, scrub the registry, etc. Not really productive and not part of my job description as far as my employer is concerned.

    • Edited by TEM Worker Tuesday, July 09, 2013 1:25 PM machine detail omitted
    Tuesday, July 09, 2013 1:24 PM
  • There may be an optional Microsoft update that addresses this issue. Run a manual Windows Update and look at the optional updates for USB issues.


    Thursday, July 18, 2013 6:46 PM
  • Hey Guys,

    I was experiencing the same problem but on two Windows 7 machines.  It occurred to me that my USB 2.0 external drives had trouble on my laptops USB 3.0 ports.  And sure enough, when I switched the KVM connection to the laptop from a 3.0 port to a 2.0 port it all started working.  I believe the desktop is old enough that is has no 3.0 ports. 

    Of course, I haven't technically verified any of this, but this the gist I have of what is going on with my system.

    Hope it helps one of you.


    Thursday, October 03, 2013 12:24 AM
  • I have a new Belkin Switch2 which doesn't work with the two Windows 7 PCs and 1 XP PC I have tried. The Switch2 doesn't allow me to go to BIOS as I would otherwise be able to, by tapping the Del key.

    This suggests to me the issue is not with Microsoft, but a setting somewhere within the BIOS.

    I'd still like to get to the bottom of this.

    Wednesday, July 09, 2014 5:43 PM
  • The firmware upgrade on the belkin site will fix this problem, at least it did for me.

    Firmware Upgrade Instructions for Pro3 KVM Switches
    For Models: F1DA104Z, F1DA108Z, and F1DA116Z

    I cant leave a link but a search on Google will find the files.



    Wednesday, May 20, 2015 2:09 PM
  • I had a similar thing with my HP desktop.

    The sometimes the KB but always the mouse would not work with this particular desktop.

    I had a v1 Belkin KVM 4 port SOHO so there was no firmware upgrade for it.

    BUT after much head scratching - I looked in the BIOS and changed the security settings for allowing emulation technology - PLUS i changed something else, turning on USB something??

    and F me it now works.


    Wednesday, July 22, 2015 9:11 PM
  • This is a mystical issue which Microsoft does not want us to know about.

    The trick to resolve this is very easy. Go into Control Panel / POWER Options / Change Plan Settings

    Now "Change Advanced power setting"

    Here you will have to disable USB SELECTIVE SUSPEND SETTINGS (if you have a laptop make sure you disable it on both battery and plugged in).

    Also go into Device Manager, and make sure your device is enumerated there correctly, make sure under Universal Serial Bus Controllers you do not allow "Windows" to power down this device.

    I hope this helps people out there.

    Monday, November 21, 2016 9:18 PM