Will formatting a hard drive remove virus?
Yes it will, but it will also remove EVERYTHING on the drive;
your personal files, settings, programs, even your operating
system.
Don't attempt to format your hard drive unless
A) You are prepared to loose everything on the drive AND you
have experience installing Windows or another operating system.
B) It is a secondary drive (such as an external hard drive)
which has no system files AND you are prepared to loose everything
on the drive.