Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have a problem with an Optiplex 755 PC running (32-bit) Windows 7 Professional. I just installed the operating system last week, and ever since, it seems to crash when I lock the screen. It doesn't happen immediately; it's usually after I walk away, so a few minutes (but I'm not sure exactly how many).

I have this non-specific error in the Event log. I've run a chkdsk, thinking it might be hard drive-related, but that didn't help. Any ideas on what to check and how are appreciated.

Log Name:      System
Source:        Microsoft-Windows-Kernel-Power
Date:          11/17/2010 3:09:28 PM
Event ID:      41
Task Category: (63)
Level:         Critical
Keywords:      (2)
User:          SYSTEM
Computer:      WORKSTATION.domain.local
The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.
Event Xml:
<Event xmlns="">
    <Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
    <TimeCreated SystemTime="2010-11-17T20:09:28.627614200Z" />
    <Correlation />
    <Execution ProcessID="4" ThreadID="8" />
    <Security UserID="S-1-5-18" />
    <Data Name="BugcheckCode">0</Data>
    <Data Name="BugcheckParameter1">0x0</Data>
    <Data Name="BugcheckParameter2">0x0</Data>
    <Data Name="BugcheckParameter3">0x0</Data>
    <Data Name="BugcheckParameter4">0x0</Data>
    <Data Name="SleepInProgress">false</Data>
    <Data Name="PowerButtonTimestamp">0</Data>
share|improve this question

migrated from Nov 17 '10 at 21:28

This question came from our site for system and network administrators.

This question will most likely be voted to be moved to SuperUser, which is a better forum for problems a single user is having with a single personal computer. Don't double-post this question there; it will be moved automatically when enough people vote for the move. – mfinni Nov 17 '10 at 21:03
up vote 2 down vote accepted

If the screen shuts off while it is locked you are more than likely experiencing a video driver problem. A good test to perform would be to remove the driver and run with the windows native one, or alternatively you could press f8 at boot and load VGA mode. Test locking it and letting it sit for a few minutes I think you will find that it is no longer crashing. The next step would be to find new drivers or old ones that work, let me know if you need help with this.

share|improve this answer
I'm sorry I never responded. As it turns out, drivers were the issue (although I thought I had updated them when I installed the OS). No more crashing for a while now! :) Thanks for the suggestion. – White Island Feb 23 '11 at 19:54
Wow @white island it's been a while I completely forgot about this question. Glad you got it working :D. – Not Kyle stop stalking me Feb 23 '11 at 19:58

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .