A computer virus is a very small program that hides insideanother program. When an infected program is executed, the virus code isexecuted, together with the original program. A virus usually infects otherprograms or disks and then performs some other kind of task.
Viruses cansometimes be very damaging.
Scan your computer and floppy disks for viruses. It's always safest to cold boot from a clean, write-protected system disk and then scan. OK, I have a virus. If you didn't cold boot from a write-protected floppy, do so now and scan the system again. If the virus is in a file and you have a clean copy of the file somewhere else, then delete the virus-infected file.