A resposta curta é não.
A Restauração do Sistema pode ajudar a espalhar um vírus.
Veja aqui para mais informações: Removendo vírus com restauração do sistema . Citando as partes relevantes:
When System Restore first appeared in the market, computer manufacturers and other companies claimed ... that it could remove viruses and fix other problems with the computer.
In reality, System Restore can create copies of the infected files. And some viruses may be capable of infecting the restore volume as well as the actual system files. When a person cleans their computer using an anti-virus, then uses System Restore, they may inadvertently re-infect the computer. Or if they use System Restore as a means of removal, either the restore will fail (if the anti-virus cleans the virus out during the restore process) or the restore will replace the file with an infected version.