C9) Is my disk infected with the Stoned virus? Of course the answer to this, and many similar questions, is to obtain a good virus detector. There are many to choose from, including ones that will scan diskettes automatically as you use them. Remember to check all diskettes, even non-system ("data") diskettes. It is possible, if you have an urgent need to check a system when you don't have any anti-viral tools, to boot from a clean system diskette, and use the CHKDSK method (mentioned in C1) to see if it is in memory, then look at the boot sector with a disk editor. Usually the first few bytes will indicate the characteristic far jump of the Stoned virus; however, you could be looking at a perfectly good disk that has been "innoculated" against the virus, or at a diskette that seems safe but contains a totally different type of virus. .