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Audio/video glitch when Shadow Copy service starts?

tag-icon • tag-icon windows-7 windows freeze services volume-shadow-copy
Audio/video glitch when Shadow Copy service starts?

Ich habe einen 64-Bit-PC mit Windows 7, mit dem ich seit einiger Zeit ein seltsames Problem habe. Ab und zu „friert“ mein Computer für ein oder zwei Sekunden ein; der Ton ist für diese paar Sekunden verzerrt und das Video friert ein.

Ich glaube, ich habe das Problem eingegrenzt, indem ich es mit einigen Ereignissen in Verbindung bringe, die ich zu dem Zeitpunkt im Ereignisprotokoll sehe, als ich das Problem bemerkt habe. Es ist heute bisher zweimal passiert:

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

Den Veranstaltungen zufolge werden folgende Dienste gestartet:

  1. The Volume Shadow Copy service entered the running state.
  2. The Microsoft Software Shadow Copy Provider service entered the running state.
  3. 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:

DPC Latency Checker-Fenster während des Problems

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.

Windows-Leistungsanalysator

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?

Antwort1

The root cause:

  1. Every 15 minutes, CrashPlan was starting a local backup
  2. This started the Shadow Copy services
  3. Shadow Copy was causing the audio/video stutters

A workaround:

In CrashPlan settings, go to the Backup tab and Configure the advanced settings so that "Back up open files" is unchecked.

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