w-boot virus

AVG6.0 tells me to reboot using a boot disk and then use the AVG rescue disk to remove the virus by healing. When I restart my computer and put in the boot disk I get to a menu with three options.

1-Start win98 setup. [this goes to the installation of windows (I have the CD)]
2-Start win98 with CD-ROM support. [this loads up ASPI manager, CD-ROM driver, and MSCDEX, all off the A drive, and then stops with the A/: prompt displayed, the cd drive isn't used at all. I don't know what I'm supposed to do next.]
3-Start win98 without CD-ROM support. [this goes straight to the A/: prompt]

If I choose option 2 or 3 and then put in the AVG rescue disk it churns away for a bit and then asks me for the location of command.com. This file is on the boot disk, so have I not finished booting yet? what do I need to do?

Also I tried Panda Titanium and Fire Antivirus, but niether could detect the virus (I told them to scan the boot sector as well). Looking in the help folder for Fire Antivirus it displayes the following steps:

1. Boot the PC from a clean system floppy--this must be MS-DOS 5.0 or version 6.0 or higher of PC-DOS or DR DOS. This diskette should carry copies of the DOS utilities MEM, FDISK, CHKDSK, UNFORMAT and SYS.

2. Check that your memory configuration is "normal" with MEM. Check that your hard disk partitioning is normal--run FDISK and use the "Display partition information" option to check this. MS-DOS 5.0 (or later) users can use UNFORMAT /L /PARTN.

3. Try doing a DIR of your hard disk/s (C:, D:, etc). You should continue with Step 4 only if all the tests in Step 2 and this step pass. Do NOT continue if you were unable to correctly access all your hard disks, as you will quite possibly damage critical information making permanent data damage or loss more likely.

4. Replace the program (code) part of the MBR by using the MS-, or PC-DOS FDISK /MBR command. If you use DR DOS 6.0, or later, select the FDISK menu option "Re-write Master Boot Record".

5. Replace the DOS boot sector using the command SYS C: (or whatever is correct for your first hard disk partition). For this step, the version of DOS on your boot diskette must be exactly the same as is installed on your hard disk (this may mean you have to first reboot with a clean boot diskette other than that used in Step 1). If you are using a disk compression system, such as DoubleSpace of DriveSpace, check the documentation on how to locate the physical drive on which the compressed volume is installed, and apply the SYS command to that instead. Usually this is drive H: or I:.

6.Reboot from your hard disk and check that all is well--if not (which is unlikely if you made the recommended checks), seek expert help.

7. As you will get re-infected by forgetting an infected diskette in your A: drive at boot time, you have to clean all your floppies as well. This is harder, as there is no simple way of doing this with standard DOS tools. You can copy the files from each of your floppies, re-format them and copy the files back, but this is a very tedious process (and prone to destructive errors!). At this point you probably should consider obtaining some good antivirus software.

FDISK /MBR will only overwrite the boot loader code in the MBR of the first hard drive in a system. However, a few viruses will infect both drives in a two drive system. Although the second hard drive is never booted from in normal PC configurations, should the second drive from such a machine ever be used as the first drive in a system, it will still be infected and in need of disinfecting.



The problem here is that again, I need to boot using a startup disk, and also I'm not sure about those programmes, my boot disk has: FDISK, FINDCD, EXTRACT, MSCDEX.

Any help would be appreciated,
--Gummo