When it comes to the best operating system to use for a vintage PC, if it has a 286 or better processor, there is little reason to use anything older than MS-DOS 5 or PC-DOS 5. But with an XT, it’s a little different. The best MS-DOS version to use is one you may have never heard of. MS-DOS 3.31 was an upgrade you couldn’t buy.

David Farquhar is a computer security professional, entrepreneur, and author. He has written professionally about computers since 1991, so he was writing about retro computers when they were still new. He has been working in IT professionally since 1994 and has specialized in vulnerability management since 2013. He holds Security+ and CISSP certifications. Today he blogs five times a week, mostly about retro computers and retro gaming covering the time period from 1975 to 2000.










