SysRescue 4.0.424.0 doesn't work

[Geosoft]

I tried putting the disk in multiple systems. I get as far as updating the virus signature, but there is no option anywhere to scan the machine.

Going to have to downgrade.

[trencan]

Don't understand clearly. You see virus signature updating after boot of SysRescue. Does it finish successfully? You wrote: "but there is no option anywhere to scan the machine". Don't you see "Computer scan" on the left in egui? If you click on it, then you can choose "Smart" or "Custom" scan. If you choose "Custom scan" then you should see list of disk drives. If now there is no drive letter for volumes on your HDD, then it means, you don't have disk drivers injected in SysRescue. Do you have any SCSI controllers in your PC?