Manlau

I have similar problem before. I think your best bet is to find someone who knows computer to help. Since your computer has been infected with virus. You may need to "flush your BIOS"  to reset your system. ( I am not kidding, the virus that hit mine corrupted the settings data in my BIOS.) That means you need to know the motherboard's made, model number and revision number and................
Honestly, its time for you to buy a new computer la.......................