Ok, I am really stuck with this. I have something running on my computer that is causing a delay in opening programs (CPU usage jumps from 7% to about 40% for about 10 seconds). Task manager shows 2 copies of IE running in the background (I don't use IE) and every now and then an internet explorer page will open for no reason, usually to some ad.yieldmanager website. I have running a complete virus scan (including in safe mode), ccleaner, spybot, adaware and Super Anti-Spyware. Not one of those things has found anything. Here is the logfile for hijack this if anyone could help. Thanks in advance Logfile of Trend Micro HijackThis v2.0.2 Scan saved at 7:38:40 PM, on 3/1/2009 Platform: Windows XP SP3 (WinNT 5.01.2600) MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512) Boot mode: Normal Moderator Edit: All logs must be attached using the Paperclip button -> Pasted logs removed. Have a look at: UPDATED 8-step Viruses/Spyware/Malware Preliminary Removal Instructions .