AL_AN, same symptoms here.
IE 11, lots of tabs, when allocating memory (opening another tab, pressing "play" to start a video/animation, etc) the screen flickers, goes black for some seconds or screen update/redraw does not draw all windows correctly.
The logout just happened to me again,
After kindly logging my user off, no questions asked, I logged back in, started IE (nothing else), confirmed that I wanted to restore my "unexpectedly closed" session, waited for all tabs to load, then pressed play on
the clip I was trying to watch. New screen flicker, new logout, no questions asked.
Again:
Application log gets winlogon 6003, then 6000 3-4 seconds later.
System log gets winlogon 7001 at the exact same time as the 6003 in the application log.
A couple of minutes before the logoff Diagnostics-Performance logs two or more 500/501 entries with opcodes Video Memory Degradation, then Video Memory Responsiveness. Messages are:
The Desktop Window Manager is experiencing heavy resource contention.
Scenario : The Desktop Window Manager responsiveness has degraded.
The Desktop Window Manager is experiencing heavy resource contention.
Reason : CPU resources are over-utilized.
Diagnosis : A sharp degradation in Desktop Window Manager responsiveness was observed.
The Desktop Window Manager is experiencing heavy resource contention.
Scenario : Video memory resources are over-utilized and there is thrashing happening as a result. Reducing number of running programs and open windows may help resolve this condition.
HOWEVER, these event entries seem to be logged a lot more often than the logoffs happen so it's hard to tell whether they are related or not.
Magnus