I have two Trojan viruses that AVG can't remove. Where to now?

I am running Windows XP and remember that there is a back-dating function for removal of viruses but forgotten how to access it. Any help would be appreciated.

I have two Trojan viruses that AVG can't remove. Where to now?free spyware remover

Malware may still be lurking in your system restore volumes so it would be in your best interests to disable system restore, reboot then re-enable system restore when you log back on. What this does is protects you from reloading the malware should you ever need to do a system restore.

Many anti-virus products cannot remove viruses from system restore thus the reason for clearing out possible infected points. For reference to this, see the link below:

Problems with System Restore

There are some problems associated with System Restore when it comes to viruses. When restore points are created they are stored in a directory that is accessible only to the System account and not to a user. This keeps the restore points safe from misuse and tampering. Unfortunately this also means that any virus scan software you may have installed can not scan the files located there as well. This causes a problem if a file that is infected with a virus gets backed up into a restore point because now the anti-virus software can not clean it. Now if you ever restore from a restore point, that file that is infected will be introduced back into your system.