My brother recently went on my computer and looked at porn pages and I got a bunch of garbage hidden everywhere. I cleared out what I could find in the system32 file and the prefetch file and so on, but every time I start up Windows now, My Documents opens. I can't figure out what would CAUSE this, and therefore cannot fix it. I am using Windows XP on an HP computer. I would REALY appreciate any help anyone could give! ALSO, if there is any way to password IE, let me know about it so this doesn't happen again!You should put a password on Windows.

Use Mozilla Firefox for adware free serving. Enable manual cookie control.

Virus scanners
AVG Free
-- Anti virus scanner
Trend Micro Housecall
-- Online anti virus scanner.

Anti spy/malware
Microsoft Antispyware
-- Anti spyware scanner. Windows XP Home and Professional only.
Spybot Search & Destroy
-- Anti spyware scanner
Adaware SE Personal
-- Anti spyware scanner

Firewalls
Use both a hardware and software firewall.
Be advised as dual software firewalls may cause problems

ZoneAlarm Free
-- Free firewall - more user friendly
Sygate Personal
-- Free firewall - more configuration options

Removal tools
The following files are not substitutes for the ones described above.
They are either DIAGNOSTIC tools or removal tools for malware of a certain kind

HijackThis
-- Manual malware remover. Post the HijackThis LOG GENERATED only if requested!
McAfee Stinger
-- Virus removal tool. No substitute for a fully functional virus scanner!
CWshredder
-- CoolWebSearch removal tool. Widely known and persistant Hijacker.