Explorer eating 50% cpu - hyperthreading?

[Kristensen]

I've got a pretty darn serious problem.... When my comp has been on for an average of 30 seconds, explorer takes a minimum of 50% of my cpu. Along with approx. 150 mb of my RAM. That is annoying. Performance is, needles to say, ROTTEN. I suspect hyperthreading has a part in it, as 50% cpu would seems to round a figure to be just coincidental. I suppose i could turn off HT, or maybe reinstall windows, but these are not satifactory sollutions.

My comp is: Abit AI7 (intel 865), 512 kingston hyperX(dual), 3 ghz intel HT (socket 478, 800 mhz fsb), various harddisks(two of them on a fasttrack100 raidcontroller)

Win XP with sp1

Any help would be much appreciated!

[SiMoNsAyS]

start from scratch, use any AV app, then anti-spyware. if that not solves the problem you can continue degraging and finally kill all the unneeded processes to see if explorer still takes that amount of resources...

[Kristensen]

I'm currently using adaware+adwatch and symantec coorporate anti virus.... No luck though

[XtremeMaC]

when did this started happening any ideas?

check with other spyware programs.

download process explorer and have a better look at the running proceses, kill the ones u suspect...