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Can BIOS be infected with a virus??

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Name: Cozmo
Date: August 13, 2001 at 22:37:52 Pacific
Comment:

I am having SO much trouble installing windows ME. My floppy drive was working fine while i was installing ME but I got a virus message from the default virus scan on my motherboard saying that my boot disk may be infected. After that my floppy drive has not responed on boot-up or by placing a disk into it. What the HELL is going on? I know that the floppy is working fine and the cables are hooked up right but it just won't respond. I need to run FDISK!!



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Response Number 1
Name: The Doofus
Date: August 13, 2001 at 23:15:07 Pacific
Reply:

You should have the on-board anti-virus disabled when installing Windows as it prevents the install from writing a new boot block and that's one of the things it has to do. As for your floppy disk; you should have checked the floppy with a software anti-virus before using it to boot the system. There are a couple of Boot sector virii that can make a floppy drive unreadable.

This is a very likely candidate

This one is really annoying

This one can really f*ck you up.

As can this one, but is very unlikely

No matter which one it is, you'll want to shut down (not reboot) the machine and run a copy of F-Prot that has been made to a bootable diskette on a CLEAN computer. When you "cold boot with the diskette, make d*mn sure it's WRITE PROTECTED. If you e-mail me Here I will mail you a disk image of a bootable F-Prot disk. You will get an "out of date" warning when you use it, but ignore it as the boot sector virii will be much older than the virus definition. W0rm has a great F-prot disk, but it loads into memory which is not a good thing when a virus might be resident in memory. Make sure the machine you make the diskette on is clean.


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Response Number 2
Name: Jim
Date: August 14, 2001 at 08:56:17 Pacific
Reply:

If I may add something, there are virii (such as the one packaged up as Doh.exe)which can travel on a floppy and corrupt a flash-bios. I discovered this by experimenting on my own machines heh, heh.
When the bios code is corrupt the floppy drive might not work. There would probably be an error beep-code. On mine it was 9 beeps. Removing the battery or otherwise erasing the CMOS can allow the floppy drive to work again, which is good cuz you need it if you have to flash the bios. Hopefully you don't have this nasty scenario happening :-)


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