Windows 7: A consistent degradation in frame rate for the Desktop Window Manager

symptoms, Blue Ray DVD playing DVD would run and eventually crash
reboot required to get it back to life.
Could not play an entire DVD
Could not restart



Investigated Error Logs

Ive been getting this warning out of Windows 7 Event Viewer for some time re Diagnostics-Performance Operational

The Desktop Window Manager is experiencing heavy resource contention.
Reason : Graphics subsystem resources are over-utilized.
Diagnosis : A consistent degradation in frame rate for the Desktop Window Manager was observed over a period of time.

take a look in Event Viewer at Administrative Events
Right Click go to find and write in "igdumd32.dll" or alternately "igdumd64.dll"
this is what came up:

Faulting application name: wmplayer.exe, version: 12.0.7601.17514, time stamp: 0x4ce7a485
Faulting module name: igdumd32.dll, version: 8.15.10.2509, time stamp: 0x4e5e8fd6
Exception code: 0xc0000005
Fault offset: 0x000fb73f
Faulting process id: 0x11a4
Faulting application start time: 0x01cd4b328fcec9c5
Faulting application path: C:\Program Files (x86)\Windows Media Player\wmplayer.exe
Faulting module path: C:\Windows\system32\igdumd32.dll
Report Id: efdfc248-b725-11e1-8a77-386077b47ff9

Note the app was looking for, igdumd32.dll
I suspected "igdumd64.dll" corrupt dll file in C:\Windows\System32, igdumd64.dll
the one aboard was 8+Mb, had no previous version, I found another online at 5.7Mb.

swapped it by killing everything that I could in Task Manager until copy/paste took

rebooted, problem solved

Note to Mods: Edit the title to something less subjective if you care to
cheers all