XP freezes on rapid cursor movements under heavy cpu load

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Hi,
when I "work too fast" under heavy system load, i.e. I switch between
task windows, open and close browser tabs and move the mouse cursor
rapidly across the screen I experience random system lockups (system
hangs or system freezes). I can only press the power switch and
restart the system.

It happens about once in 48 hours but it happens out of a sudden, I've
never found an error message close to the crash time in the logfiles.

I am running XP-pro SP2 on a Mobile AMD Athlon XP-M 2800+ Fujitsu
Amilo K 7600 Laptop PC with 1GB of RAM

Video: KN266 integrated S3 Prosavage 32 Mbyte shared memory, true
color
Audio: 18-bit stereo audio (AC97)
Pointing device: Synaptics Touchpad, SynTPLpr.exe running but not
SynTPEnh
a D-Link Airplus DWL-G650+ wireles adapter sits in the Cardbus slot
(PC-Card, PCMCIA)

Hardware Manager shows a clean tree without warnings.

My web browser is Firefox 2.0.0.6. I always have at least 2 dozen
browser tabs open so Firefox consumes up to 350-400 MB of my 1000 MB
RAM.

I tried to run msinfo but I get the Windows Help window.

I have changed Windows' performance options to give background
services more CPU time and to give programs more memory. I feel that
helped a little. But Firefox appears a bit lame now and the freezes
still occur.


What else should I try?

Best regards,
Dieter

.

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