It seems like this is something that should go without saying, but I wish I had a dollar for every time someone brings a computer to us riddled with viruses and spyware.
More often than not, the computer has some type of antivirus installed, but the subscription to updates has expired long ago. Depending on the severity of the problem, the hard drive may have to be wiped out and everything re-installed from scratch. Some of the viruses are damaging enough that even after cleaning up, the computer is too unstable to be usable.
So please, check your computer to make sure it is protected and that your antivirus and anti-spyware is up to date.
Over and out!