if someone dont want to search for it here is the whole instruction:
Reduce the graphics hardware acceleration setting to determine whether there is an issue with the video adapter or the video driver. To do this, follow the steps for the operating system that you are using.
Windows Vista
1. Click Start, click Control Panel, click Appearance and Personalization, click Personalization, click Display Settings, and then click Advanced Settings.
2. Click the Troubleshoot tab, and then click Change Settings.
If you are prompted for an administrator password or for confirmation, type the password, or provide confirmation.
3. Move the Hardware Acceleration slider to the left. The Hardware Acceleration setting should not be reduced to less than three notches from the right. The Hardware Acceleration setting should be set to the following:
Disable all DirectDraw and Direct3D accelerations, as well as all cursor and advanced drawing accelerations.
If you reduce the Hardware Acceleration setting, you may experience more issues with video rendering.
4. Click OK three times, and then close the window.
and here is the warning:
The above option depends on your Graphics Drivers as well, as an example on my system using the Nvidia 158.18 drivers, they don't allow accleration options to be altered at all.
for me everything is fine until clicking change settings in step 2... that guy had 158.18 drivers, i have 180.48, but neither of them allow to change those settings. what drivers do you have mawane? and who with what drivers may edit those?