Since daylight savings time began this year, my Lenovo ThinkPad (Win 7 Pro SP1, 64 bit) keeps reverting to standard time. I have reset it three or four times, but later find it has again turned back an hour. Today this caused a near-catastrophe with schedules.
The laptop is always plugged into a power source, and the battery has been removed. How to get the clock stabilized at the proper setting?