You have a Windows Vista-based computer that supports High Precision Event Timer (HPET). When you restart the computer, the system time that is displayed on the clock lags behind the actual time. After you restart the computer several times, the system time lags behind the actual time even more.

You may experience the following problems in Windows Vista when you use a high performance mouse, and you enable the Enhanced Pointer Precision option:

• The pointer does not move correctly when you move the mouse down and to the right side.
• The pointer moves by itself.
• The pointer movement is irregular.