To boot your PC from a floppy disk, you need to enter setup (pressing Del key during the memory count that occurs when you turn your PC on) and change the Boot Order (or Boot Sequence) option to “Floppy”, “A:, C:” or similar.Īfter performing all steps we described, your motherboard will be alive again and your hard disk will be recovered. Don’t try to boot your from your hard disk, because it is infected and you won’t be able to remove the virus. This is a 20 KB DOS software, so you can copy it to your bootable floppy and run it after booting from a floppy. We recommend you to download and run cleancih, which can be downloaded from. It can take a couple of hours recovering your data, specially with you have a large hard disk.Īfter recovering the hard disk, you will need to run an antivirus software to remove the virus, that will still be stored on your hard disk. Format this floppy from a computer without virus (of course) and using at least Windows 98 (if you format it using DOS or Windows 95, it won’t recognize FAT32 partitions and you probably won’t be able to recover your hard disk). You will need to create a bootable floppy and copy this program to it, and then boot the infected computer from this floppy. This software is small and really efficient. CIH works under both Windows 95 and Windows 98, but it does not work under Windows NT. It does not infect Word or Excel documents.
After an infected EXE is executed, the virus will stay in memory and will infect other programs as they are accessed. From all softwares we tested, the best one is the Fix-cih, which is free and can be downloaded at. The CIH virus infects Windows 95 and 98 executable files (EXE files). To recover your hard disk, you will need to use a data recovery software.
We say that because if the virus was triggered to the point of erasing the BIOS chip, it probably erased your hard disk partition and FAT tables as well. After reviving your motherboard, you will probably need to recover your hard disk.
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