hi,i am having problems here,i have had some advice from a couple of guy's(thanx) regarding viruses/trojans etc,the problem being my pc is slowing down dramatically,also internet explorer on desktop does not open unless i click run as........ security websites wont let me have an online scan,any anti virus downloads don't happen,infact anything i try to download doesn't work i get the download dialog box to open then it says file downloading although there is no movement in the status bar then after a minute or so i get the message internet explorer cannot download file,i am using windows xp,i updated my norton anti virus 2003 AFTER i realised there was a problem,as a novice any advice is much appreciated.