Hi,
I have virus in my computer called pwsteal.trojan and there is only one infected file : c:\windows\system32\explorer.exe and I have norton 2003 and it couldn't fix it or delete it.
Then I tried 2 use (the cleaner)but also it couldn't fix it.
Also I tried to enter symantec.com but I didn't understand what to do so I hope that someone could help me.

Lots of viri have the sam alias did you get a more specific name also try the free online scanner form trend micro its pretty good and can usually get the ones that norton cannot. http://housecall.antivirus.com/

This is very old virus and it is detected and cleaned by Norton AntiVirus (Also a tutorial on how to remove this virus is available on syamatec site).
For more information visit this URL: http://securityresponse.symantec.com/avcenter/venc/data/pwsteal.trojan.html

Tip: To get details about these kind of old viruses, search in symantec virus dictionary provided on symantec website. URL: http://securityresponse.symantec.com/avcenter/vinfodb.html#threat_list