KB938979 attempts to fix the following performance issues and bugs to increase performance, responsiveness and reliability of Windows Vista :
- 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.
- If User Account Control is disabled on the computer, you cannot install a network printer successfully. This problem occurs if the network printer is hosted by a Windows XP-based or a Windows Server 2003-based computer.
- 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. This problem occurs if the RAW image is from any of the Canon EOS 1D and Canon EOS 1DS digital SLR camera models.
- After you resume the computer from hibernation, the computer loses its default gateway address.
- Poor memory management performance occurs.
Failed WGA validation check? Check out direct links to setup file.
KB938979 update can be applied to Windows Vista Enterprise, Business, Home Premium and Ultimate edition. Windows Genuine Advantage validation required so your Windows Vista must be genuine and legitimate.
The download is in Microsoft Update Standalone Installer .msu format. But it works just like a normal .exe executable, simply double click to install the update.
Microsoft also releases another KB938194 update to improves reliability of Windows Vista.