Now that you have your Micro win98, make it corporate meaning that you don't need a serial number B) Extract the Win98 CD content to your hard disk (e.g. F:\W98) with WinISO as a bootable .iso-file within this file find: Precopy2.cab Open it with WinRar then, find setupx.dll & extract it to somewhere. Open extracted setupx.dll using eXescope In eXescope, expand "Resource" then "String" & find number "96" Click on "96", on the left you will see this number "1526,111" or "1526, 121" or "1526, 115"... ... The last 2 digits may vary depending on the version you have. In any case, change "1526,1xx" into "1526,100" and save. Import the modified setupx.dll into the same folder (win98 folder on CD) where precopy2.cab (and a bunch of other cab-files) reside. Now, each time you run the install for Win98, you won't have to enter any serial number, nor will there be an upgrade/OEM/full check. You can do either a clean install or an upgrade as you wish, because it becomes a full version.