I have a Windows 7 64 bit PC that I've started having a strange issue with. Every so often my computer "freezes" for a second or two; any audio will be distorted for those couple seconds and video will freeze.
I think I've narrowed down the problem to correlate with some events I see in the event log around the time I notice the issue. It has happened twice today so far:
Information 8/9/2013 9:42:34 AM Service Control Manager 7036 None Information 8/9/2013 9:42:19 AM Service Control Manager 7036 None Information 8/9/2013 9:42:19 AM Service Control Manager 7036 None Information 8/9/2013 10:59:29 AM Service Control Manager 7036 None Information 8/9/2013 10:59:29 AM Service Control Manager 7036 None
These are the services that the events say are starting:
- The Volume Shadow Copy service entered the running state.
- The Microsoft Software Shadow Copy Provider service entered the running state.
- The Application Information service entered the running state.
From my research online, it doesn't look like this is something I want to disable. Is there some way to change when it starts or troubleshoot why it is locking my PC?
Update #1 - Ran a scheduled check disk.. didn't find anything major.
I ran DPC Latency Checker and waited for the issue to happen again. Again, the same two shadow copy services started running and it went crazy:
Update #2 - I followed the guide suggested by @magicandre1981 in the comments. I couldn't find the "DPC CPU Usage" or "Interrupt CPU Usage" graphs.. so I used the DPC Timeline by Module, Function graph.
Looks like this points to something plugged in via USB?
Update #3 - I'm pretty sure the VSS service is being started by CrashPlan. It was actually running every 15 minutes or so. I've disabled the "Back up open files" option to see if that fixes my issue. However, that still doesn't explain why the VSS service is causing all these DPC latency issues?