Bobby, I'm no expert, but I sincerely doubt it makes any difference at all what OS you install. Unless the disk somehow requires fat16, in which case you'd install Win95a or Win3.1, you're fine with Win98. I've used win95b OEM - which came with my computer in March, 97, and I would not think twice about reformatting it and running another OS. Personally, if I were to refomat it, I'd install Windows NT (Server, if you can justify it $). However, if you're not having any problems with Win98, then I'd let it be. Just my opinions...hth Alan Thompson ----- Original Message ----- From: Bobby Sutton Subject: [PCSOFT] OS disk I have a 1995 Gateway P5133 with an Intel upgrade to 200 MMX , of course it came with Win 95, one of the very first editions ( Nov 95 ) I have since formatted the drive and installed a clean install of win 98 from my P111 450Mhz Comp USA box at work. I have heard that these OS Disk are made for these individual computers and that there are differences. I am having no problems but feel that Win 95 may be better since it was designed for this older computer system . Is this in my mind or is there any truth to differences in older and newer computers and operating systems ? Running 80 Megs of ram TIA, Bobby Sutton "Hold No Punches.." Rode brings you great shareware/freeware programs with his honest opinions in this weekly column. http://nospin.com/rode