It's possible that a network install can't find winnt32.exe. It isn't copied to the hard disk. Add this to TXTSETUP.SIF: [sourceDisksFiles] WINNT32.EXE = 1,,,,,,,,3,3 And this to DOSNET.INF: [Files] d1,WINNT32.EXE If that doesn't fix the problem I'm not really sure how to do it. I'll search around...