There are already thousands of different viruses and new ones emerge every week. Click Here to get info on the latest viruses . Most viruses are spread through a floppy disk or from file attachments on e-mail. Once an infected disk is used in another computer, it copies itself onto that computer. Depending on the virus, it may strike immediately and cause problems, or it may lie dormant until a certain program is run or until a certain date occurs.
Viruses spread very rapidly.
If you find that your computer has been infected, you should assume that every disk and computer that you work with or nearby is also infected. Failure to scan and disinfect every disk and computer will almost guarantee that the virus will re-emerge. Once you remove a virus, you must scan all of your disks and computers for any signs of infections. It usually comes back from a laptop or floppy disks that were not scanned the first time - make sure you thoroughly scan ALL computers and disks for viruses. It is updated every few days on the latest viruses.