Andrew Hodes wrote:
If it happens while windows is running it is, positively and
categorically, NOT the battery. And I am getting very tired of people
suggesting it is. Windows uses that click solely as a start point, and
battery trouble is indicated by the time being wildly wrong at boot.
This problem seems to happen quite often, especially with Dell
machines. Usually a steady rate of loss like 10 minutes in an hour, but
may be a gain. It appears to result from a conflict with the BIOS over
the interval between 'timer interrupts'. Windows maintains the clock by
counting these, so if the interval is not the expected one, the rate is
grossly out in this manner.
Try these steps:
1. Start->Run cmd.exe
2. net stop w32time
3. w32tm.exe /unregister
4. w32tm.exe /register
5. net start w32time
(note spellings w32tm and w32time in different commands)