Computer slows-down while opening and closing programs sometimes

[admin4real]

I am running windows xp pro with SP1 installed on a pen 4 2 ghz with 512mb of pc2700 ddrram, radeon 9800 pro and 2 80 gig hard drives. When i open up 1,2,3,... applications and minimize them or open up something else while it is running my computer slows down alot. I've tried everthing from bootvis, to tweak xp-pro to customizer xp and going to blkviper and cutting off all unneed services by using services.msc. After closing 3d games sometime i experience this slowdown. I am very pissed off because so far i haven found the solution to my problems. Any help i would greatly appreaciate as i am using my computer often.

 

[denzilla]

Installed Q815411 that was mentioned at the top of page. Fixed the problem instantly! No adverse effects as far as I see.