You probably don't have a virus. If your machine turns off immediately, you have a pretty critical hardware fault.
You need to take all of the components off your notebook you can (optical drive, wireless card, use only 1 stick of RAM, use an external monitor, remove the hard disk, battery, etc) and see if your machine will boot without them. If not, you need to completely disassemble the machine and try booting it with minimal components (your motherboard, 1 stick of RAM, and a CPU).