http://support.microsoft.com/?kbid=938194
Article ID : 938194
Last Review : August 8, 2007
This update resolves the following issues:
The screen may go blank when you try to upgrade the video driver…
The computer stops responding, and you receive a “Display driver stopped responding and has recovered” error message…
The computer stops responding or restarts unexpectedly when you play video games or perform desktop operations.
The screen goes blank after an external display device that is connected to the computer is turned off…
A computer that has NVIDIA G80 series graphic drivers installed stops responding.
Visual appearance issues occur when you play graphics-intensive games.
You experience poor playback quality when you play HD DVD disks or Blu-ray disks on a large monitor.
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http://support.microsoft.com/Default.aspx?kbid=938979
Article ID : 938979
Last Review : August 8, 2007
This update resolves the following issues on a Windows Vista-based computer:
You experience a long delay when you try to exit the Photos screen saver.
A memory leak occurs when you use the Windows Energy screen saver.
When you write data to an AVI file by using the AVIStreamWrite function, the file header of the AVI file is corrupted.
When you copy or move a large file, the “estimated time remaining” takes a long time to be calculated and displayed.
After you resume the computer from hibernation, it takes a long time to display the logon screen.
When you synchronize an offline file to a server, the offline file is corrupted.
If you edit an image file that uses the RAW image format, data loss occurs in the image file…
After you resume the computer from hibernation, the computer loses its default gateway address.
Poor memory management performance occurs.