...tried running the free online scans at the links below? If not, please do..Can you even get booted up long enough to do so?

Housecall Online Scanner

Panda Online Scanner

How old is the computer?

Just to get us on the same page here, please try ALL of the procedures in the links below:

First, download, install, update, then run ALL of the free spyware removal programs from the links below:

Ad-Aware