I have an windows 7 ultimate and skype installed. for some time skype worked correctly. but suddenly after som time after its start system hangs. I have ps/2 keyboard, but i cant even dump system after hang using ctrl+scroll lock feature. in normal mode system dumps normally. at least i noticed, that i have null device is marked as failed with error "file not found". null.sys is in place. sc start nul says "file not found". When i deleted driver sc delete null skype behaviour has changed. seems like hangs not so often. What can i do with null device to recover it?
Sorry for bad english. Please, correct me if something wrong :)
In the registry i cant find a string, that contains a path to binary of legacy driver. how system knows which binary to use with specific legacy driver?
Which version of Skype you are using? According to Windows 7 Compatibility Center, Skype version 4 is compatible with Windows 7. If you are using an earlier version of Skype, please replace it with the latest version.
However, if the issue persists after using the latest version of Skype, please access Clean Boot to check the issue. If the issue disappears in the Clean Boot environment, we continue to narrow down which entry is causing the issue.
Also, you can use Process Explorer to check which process is taking the most usage of CPU:
Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.