Microsoft released a hotfix for Windows Vista that fixes an issue with not correct updating the screen.
•Parts of the screen may go black.
•Parts of the screen may become transparent.
•The toolbar may disappear.
•The toolbar may appear at the top of the screen instead of at the bottom of the screen.
Update for Windows Vista
Download the 932406 package now.
Update for Windows Vista for x64-based systems
Download the 932406 package now.
Source: support.microsoft.com
•Parts of the screen may go black.
•Parts of the screen may become transparent.
•The toolbar may disappear.
•The toolbar may appear at the top of the screen instead of at the bottom of the screen.
Update for Windows Vista
Update for Windows Vista for x64-based systems
Source: support.microsoft.com