Eidenk Where is this debate?? I've been hunting and found nothing to back up your claim that ME is not a Windows on top of DOS. HOWEVER in MDGX's tipsme.txt I saw this (I've seen this same thing before XP came out and before I saw MDGX's site) 3. "Normal" AUTOEXEC.BAT and CONFIG.SYS files still canNOT be used [WinME overwrites/deletes them upon EVERY (re)boot ], unless one applies the DOS Patch: http://www.mdgx.com/dos.htm#ME which modifies COMMAND.COM + IO.SYS (from C:\Windows\Command\EBD) and REGENV32.EXE (from C:\Windows\System) to allow Windows ME to boot to native/real/true/pure MS-DOS and use DOS mode startup files (AUTOEXEC.BAT + CONFIG.SYS), Windows 95/98 style, to be able to use your (old) MS-DOS based apps/games that do NOT work from within a Windows DOS session/box, and tweak your CUSTOM AUTOEXEC.BAT + CONFIG.SYS files to free MAXimum conventional DOS Besides Windows ME is DOS 8.0 You said that "Windows ME can boot and operate normally without any DOS file being present at all" Which DOS files are you talking about? Command.com msdos.sys io.sys? OK I only had ME on for a short while before reverting back to 98SE (and later SE2ME) Ive just looked in the root of my WinXP disk and guess what? no "command.com", "IO.sys" or "MSDOS.sys"