Question: Will formatting my PC get rid of a nasty computer virus?
Answer: The short answer is "yes," but there’s an "if" and a "but" in there, too.
That is, consider a PC format your last resort. If you can’t remove the virus by using anti-virus software (or by manually finding and deleting an infected file), then you can erase your drive and start again by re-installing a fresh copy of Windows.
But if you backup up your files — which is recommended so you can reinstall them on the newly-formatted computer — and one of these contain the computer virus, then you’ll be re-infecting the PC all over again.
Therefore, you should be sure the backed-up files are virus-free by using an anti-virus program, and reinstall your favourite programs from the original discs they shipped on. Formatting a PC isn’t a bad idea if you know what you’re doing as it’ll make your computer run like new.
Here’s a great walkthrough on how to format your PC.