DukeKenyon

AVG free is in fact the best free antivirus program out there and is better than most pay for use antivirus programs

Sounds like you deleted a critical file. If it were me I would get a hold of the system restore disks for that particular OS and use them.

I would be impossible to identify a virus from the list you are providing. Download AVG, install it and keep it updated. If you value your computer you need to have an anti-virus program installed on it plain and simple