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Can't view network drive immediately after syncing with sync center

    Question

  • I have a Windows 7 x64 desktop (computer name: MPC) and a Windows 7 x64 laptop (computer name: MLP). I have several folders I want to sync between the two. However, recently I found out that sync center wasn't opening or syncing (but it had always opened before). Upon further investigation, I realized that I could no longer access my desktop: MPC. If I clicked the computer in "Network", it would say "A device attached to the system is not functioning" along with a generic error message about authentication problems.

    After rebuilding the offline files cache with a registry edit ("FormatDatabase"), I could click on the MPC in Network with no problems. However, once I chose files to sync for "always available offline", I could no longer click on the PC inside "Network" without an error message. It happened immediately. All I had to do was start syncing and then I'd no longer have access to the network drive. The weird thing is if I clicked MPC in Network, I'd have the error message. But if I typed the IP address in the address bar like "\\192.168.1.xx", it'd work fine. Also, if I typed "\\MPC\Users", it'd also work.

    To find out whether the desktop or laptop was the one malfunctioning, I used a virtual machine to sync the same offline files from the desktop. It worked fine. For conclusive results, I also used the laptop to sync another network computer's (computer name: SA1) files. The same problem occurred again: once I pressed "always available offline", I would no longer be able to click on "SA1" in "Network" without an error.

    I tried connecting the laptop to a wired LAN and also using wireless.

    I cleared network authentication with "net use".

    I also completely reinstalled Windows 7 x64 on my laptop.

    The problem still exists. Can anyone help?

    Sunday, March 04, 2012 5:04 AM

Answers

  • UPDATE: was working until I updated Avast Internet Security to v 7.0.1407 -- then lost all Sync Center and mapped drive networking capabilities.  I've now completely uninstalled Avast (unfortunate - 'cause I've like that program for the last couple of years) and am back to being able to offline sync again.  I looked into this a bit and came across the article below -- so, perhaps it wasn't the Microsoft .NET Framework updates afterall...

    http://forum.avast.com/index.php?topic=93995.msg748287#msg748287

    Topic: Avast 7 kills Offline files synchronisation  (Read 954 times)


    • Marked as answer by m17165 Wednesday, March 07, 2012 2:56 AM
    Tuesday, March 06, 2012 11:44 PM

All replies

  • I have the exact same problem. It started only a little while ago. I'm guessing it happened with an update?
    Sunday, March 04, 2012 7:39 AM
  • I'm guessing that if it happened with an update, many people would have noticed.

    What's your configuration like? Maybe there's something in common.

    Monday, March 05, 2012 12:22 AM
  • I'm experiencing the same problem - offline files sync stopped working a few days ago and now I can't map a network drive on my laptop (mapping a file from my desktop computer) and I'm getting the "A device attached to the system is not functioning" error message when I try opening the desktop from the list of network places on the laptop.  

    Any good leads yet on a solution?

    Tuesday, March 06, 2012 5:54 AM
  • Hi,

    Please turn off Firewall and test it again under Safe Mode with Networking. If the issue still occurs, run SFC/scannow to verify the integrity of System Files.


    Juke Chou

    TechNet Community Support

    Tuesday, March 06, 2012 8:31 AM
  • Turning off firewall and testing under safe mode with networking yielded no results. There isn't an option for "Always available offline" in that mode. Using "sfc /scannow" under administrator command (on both server and client) returned no errors within system files. What should I do now?
    Tuesday, March 06, 2012 2:41 PM
  • SUCCESS, so far... I initiated a system restore back to a point immediately before the last major update "Microsoft .NET Framework 4 (KB2600217)"

    I immediately had access again to my offline files, Sync Center is working again, etc.  

    Now, I'm not sure what to do about that .NET Framework 4 update if it comes up again my automatic system updates.

    Hope this works for you as well.


    • Proposed as answer by agape2day Tuesday, March 06, 2012 3:05 PM
    • Unproposed as answer by m17165 Tuesday, March 06, 2012 3:33 PM
    Tuesday, March 06, 2012 3:03 PM
  • No, that does not fix the problem on my machine...
    Tuesday, March 06, 2012 3:33 PM
  • UPDATE: was working until I updated Avast Internet Security to v 7.0.1407 -- then lost all Sync Center and mapped drive networking capabilities.  I've now completely uninstalled Avast (unfortunate - 'cause I've like that program for the last couple of years) and am back to being able to offline sync again.  I looked into this a bit and came across the article below -- so, perhaps it wasn't the Microsoft .NET Framework updates afterall...

    http://forum.avast.com/index.php?topic=93995.msg748287#msg748287

    Topic: Avast 7 kills Offline files synchronisation  (Read 954 times)


    • Marked as answer by m17165 Wednesday, March 07, 2012 2:56 AM
    Tuesday, March 06, 2012 11:44 PM
  • Thanks a lot! Confirmed Avast 7 is the culprit. Time to submit a support ticket with Avast.
    Wednesday, March 07, 2012 6:13 AM