Well what if it came from a website. Like my dad goes to his video website that has a lot of viruses and pop-ups and that site might be the cuase. So system restore would put the cpu back to the state that it was before my dad visited the site but the virus would still be there?
the CPU is the processor btw. But yes, technically it's still there.
technically, the term CPU can also be described as the unit that "does the work". Therefore, the computer tower itself can be called a CPU.
As far as viruses go, I've NEVER been able to remove a virus with software. Norton, useless. AVG, useless. Adware/Malware blockers and removers, useless.
The only way I've ever been able to get rid of a virus/adware/malware, was by hard reformat.