Like the subject says whats wmiprvse.exe? it sometimes appears in the task manager and i end process it and nothing happenends like if i never closed nothing. I dont think its a virus or is it? thanks

1st step , run a virus check from 1 or all of these .
Online Virus check ( free )
http://www3.ca.com/virusinfo/virusscan.aspx
http://housecall.antivirus.com/
http://www.coledata.com/virusalert.htm
http://www.cybertechhelp.com/html/misc/av.php
http://www.pandasoftware.es/activescan/activescan-com.asp
http://www.ravantivirus.com/scan/
http://www.bitdefender.com/

System Restore option in Windows Me/XP
http://www.augustana.ab.ca/other/cns/virus/
http://www.adamtj.org/repository/howto/W32.Blaster.Worm/
Users of Windows Me and Windows XP should temporarily turn off System Restore. Windows Me/XP uses this feature, which is enabled by default, to restore the files on your computer in case they become damaged. If a virus, worm, or Trojan infects a computer, System Restore may back up the virus, worm, or Trojan on the computer.

Windows prevents outside programs, including antivirus programs, from modifying System Restore. Therefore, antivirus programs or tools cannot remove threats in the System Restore folder. As a result, System Restore has the potential of restoring an infected file onto your computer, even after you have cleaned the infected files from all the other locations.

Also, a virus scan may detect a threat in the System Restore folder even though you have removed the threat.

For instructions on how to turn off System Restore, read your Windows documentation, or one of the following articles:
How to turn off or turn on Windows XP System Restore
http://service1.symantec.com/SUPPORT/tsgeninfo.nsf/docid/2001111912274039?OpenDocument&src=sec_doc_nam

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Use hijackthis .
http://www.spywareinfo.com/~merijn/downloads.html
http://mjc1.com/mirror/hjt/

Here is the logfile check list .
http://homepage.ntlworld.com/dvk01uk/tutorial.htm
http://www.help2go.com/article153.html
http://hjt.wizardsofwebsites.com/
http://www.spywareinfo.com/bhos/
http://www.spychecker.com/program/bholist.html
http://www.spywareinfo.com/~merijn/htlogtutorial.html#r
http://www.computercops.biz/postt6393.html
http://www.google.com/search?q=spyware+list

Um sir thanks for your reply i already have norton and i scanned system32 folder where the file is located and actually scanned the exact file and nothing came up and yes with all the updates maybe I should scan the whole system?

You need to leave no stone unturned , try all of above .

Um I found this website that said what it was and did etc. and im 99.9% is not a trojan but i'll still do a full system scan i havent done it in a long time anyways,thanks

If you do a sercah via google.com, teoma.com, yahoo.com (any of those or similar search engines) using:

wmiprvse.exe

as the search term/string, you'll get all manner or responses/hits telling you all about it. Google returns over 500...

Yep thats how i found out what it was and did.

It is shown here:
To find out what each Startup(or Process) item does or means
Task List Programs