Depends on the virus. Most viruses just delete certain files, while some viruses like trojans can hijack your entire computer and render it useless to you. If you're afraid of getting a virus, download an anitivirus software, or make your own like I did.
Anything that is not a UPS will not protect a computer during a blackout
your computer will explode
To avoid Computer Viruses to protect one computer to another computer.
Virus shields protect your computer from the viruses.
There are many steps to protect your data: password protect your computer's account; use a strong password; if possible use a router and turn on the software firewall in your computer.
Before the creation of anti-virus software, there was no way to protect your computer from viruses.
dont use a computer
Install anti-virus software.
One way to secure a file on your computer is to protect it with a password. Other ways to protect personal files is to encrypt them or editing permission settings on your computer.
To protect your computer from Viruses, and attempt to remove them if they attack the computer.
A surge protector.