The Natural Philosopher wrote in message ...
Some time ago I posted a PC problem - random mouse m,ovements and
windows opening and closing all teh time.

Hi

Although I didn't quite have that set of problems I once had very
annoying mouse behaviour.

After a bit of analysis I worked out it was because I used the mouse
right next to the window. On sunny days the light was strong enough
to penetrate the case and confuse the opto sensors. A new mouse with
a darker plastic case fixed it.

IanC