Remove any important files and shut down the infected computer. You can not begin to remove the virus if it is in the RAM in your computer.
Download a new BIOS flash utility (must be DOS version) and copy it to the bootable floppy you are about to make. These are found at your motherboard manufacturer's website, or at your computer manufacturer's website if you have a laptop.
Create a bootable floppy from an uninfected computer. Then write-protect the floppy.
Remove the HDD (hard disk drive or hard drive) from the infected computer. Be sure to remove all of the static electricity from your self by touching the metal case.
Start up the infected computer with the bootable floppy in the floppy drive.
When the BIOS setup page shows, Push the corresponding key to change the Boot Order.
Set the Floppy drive to boot first.
Flash your BIOS with the utility provided by the manufacturer. DO NOT TURN OFF YOUR COMPUTER UNTIL THE UTILITY TELLS YOU THAT YOU CAN. DOING SO BEFORE IT IS FINISHED MAY PERMANENTLY DAMAGE YOUR COMPUTER.
Find out which company manufactures your HDD and see if they have a utility that will do a Low-Level format. This part is important because it deletes everything from your hard drive so that no one can get it back, including the virus. Some common HDD manufacturers' tools for doing this can be found here.
Run the formatting utility provided by your HDD manufacturer.
Reinstall your Operating System of choice however you want to.
And the most important thing is that you use trusted software to remove the virus or else you will be in more trouble (if that software is infected).
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