I have troubles with strange Windows Explorer behaviour on my notebook (XP SP2). From some strange reason it swallows about 50% of CPU. It happens several times per day and it causes that the notebook starts to heat up to 70 C. When I kill the explorer proces and start it again, the CPU usage falls to standard 5% and temperature to about 55 C; but after several hours explorer makes the same trick again. I can not find out what causes this trouble. However, it is very annoying, so I would welcome any suggestion (no virus or bugs found with Avast, Spybot SearchandDestroy and Ad-Aware...).