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Amiga computer related discussion => Amiga Software Issues and Discussion => Topic started by: ingmichael on August 31, 2003, 09:47:55 AM

Title: Vius on my Amiga 500
Post by: ingmichael on August 31, 2003, 09:47:55 AM

I have a Amiga 500 and i have problems with my disks, the one Virus Program i have tells me that i have the Bytekiller Virus, but i am not able to remove this virus. I have additionally an 512kb Ram Extantion, could it be that the virus is copied to other disks via this?
What is the best virus killer program for this virus and for others?

Thanks in advance!

mailto:michael.adlboller@at.bosch.com

Title: Re: Vius on my Amiga 500
Post by: Piru on August 31, 2003, 10:10:27 AM

Quote

I have additionally an 512kb Ram Extantion, could it be that the virus is copied to other disks via this?

No.

However, most of the bootblock viruses are memory resident and stay in memory if you reboot with CTRL-Amiga-Amiga. To really get rid of the virus in memory you need to power off for 30 seconds.

If your A500 has Kickstart 1.3, use: VT-Schutz (http://vht-can.shadow-realm.org/boot-disks/vhtdk-vt.dms)

Use DMS to extract the .dms to a floppy disk, available here: dms111.run (http://vht-can.shadow-realm.org/bin/dms111.run)

If your A500 has Kickstart 2.0 or later, I recommend VirusZ (http://vht-can.shadow-realm.org/boot-disks/vhtdk-vz.dms).

For Amiga Virus Help, visit Virus Help Denmark (http://home4.inet.tele.dk/vht-dk/amiga/amiga.htm)

Title: Re: Vius on my Amiga 500
Post by: Thomas on August 31, 2003, 10:42:32 AM

First of all you need a clean boot disk. You cannot kill the virus if it is currently running. Every write access to any floppy will infect this floppy.

So write protect all floppies, then for each boot floppy switch off the computer, boot from the disk and check if the virus is present. If not, you're lucky and can kill the virus from the infected disks.

I assume this is a bootblock virus, so you can kill it by just installing a new bootblock on the infected disks. Open a shell window and enter install df1: with the infected disk in df1. If you have only one disk drive, enter install df0: + and press enter, then remove the boot disk, insert the infected disk and press enter again.

Note that disks with special bootblocks (e.g. games) cannot be cured. You can kill the virus from the bootblock but you cannot restore the original bootblock. The games probably won't start but give you a "not a dos disk" message.

If you don't find an uninfected boot disk that's bad luck. You then have to get one from another person. While the virus is in memory you cannot get rid of it.

Bye,
Thomas