If the virus is a file infecting virus the virus may be removed by deleteing infected files and reloading clean copies off of original disks or from a backup. If you have been infected by a virus you need to load resident protection. If you have been infected before chances are very good that you will be infected again. For a good resident scanner look for one that is updated frequently so that it will always offer you the most protection. For that I would recommend either Norton Anti-Virus or McAfee.
Most manufacturers update their software once a month.
Check here for the latest versions and the latest updates. Norton has just made it even easier to update their software. Common Virus Symptoms Hard Drives using MS-DOS compatiblity mode in Win95. Unable to read Disk 2 of Windows 95 Diskettes. 32 bit File Access doesn't work in Windows.