If you (or your father) have not run Spybot, do so. If you have an anti-virus package (other than the MS abortion), have it scan the system. If this solves the problem, well and good. If not, save the data files off to either a dvd or external Hard disk.
Then, either re-format and reinstall, or format and install linux (I'd suggest Ubuntu 10.04). Copy data back from backup.
Expect to spend from 3 to 4 hours for a Vista re-install, backup inclusive.
For Ubuntu, likely 2 to 3 hours, backup inclusive.
Then, either re-format and reinstall, or format and install linux (I'd suggest Ubuntu 10.04). Copy data back from backup.
Expect to spend from 3 to 4 hours for a Vista re-install, backup inclusive.
For Ubuntu, likely 2 to 3 hours, backup inclusive.