Infected by Chernobyl

If you can boot from a floppy, your bios may still be good. Chernobyl both wipes your bios (if not protected) and wipes the boot sector of your hard drive. Check your bios to see if it is write protected. If it is, then the virus did not touch it. You may need to boot to a floppy and reformat your hard drive. Good luck!

That name still give me the chills.
I was a victom of that virus and was in exactly the same situation. My motherboard was a ASUS P2B. Unfortunately, the aflash program doesn't overwrite the entire bios flash IC so you may never get the virus outof the motherboard unless you are able to remove the flash chip from the motherboard and first erase it with an eprom burner and then reprogram. Most Motherboard vendors solder their bios on to the PCB so unless you have access to surface mount soldering / desoldering equipment the board is scrap. That method works on older motherboards that don't have their bios soldered. I had such a motherboard that had a socketed bios. I removed the bios chip and erased / reprogrammed and everything worked. I'm lucky to have access to an eprom burner. I was also told, although I don't know how true this is, that the CIH virus might install itself onto the flash device of a hard drive or the hard drive controller if those device have flash eproms. In that event, I would be concerned about any re-occurance of the virus in the future. That is why I decided to scrap my P2B motherboard and get a new one. Good luck.

Regards,

Brian Burns