Hi Since I replaced my motherboard on the computer that uses Windows XP, I can't install certain DOS games on the system. Until now, some old MS-DOS games even functioned on XP, most worked within DOSBox, but all of them could at least be installed on the system. Now, in many cases, when I click on [Setup] to install the game onto the computer, the setup window will open for a moment, then close again, or I get the error message: "the parameter is incorrect". In an attempt to work around this, I've right-clicked on [setup].exe files and configured their properties to give the files 4096 RAM, and to have Win95 compatibility, but that was just a wild guess, I don't understand much about that. Can someone explain what's preventing these programs from installing on the system, and can someone share tips-and-tricks about how to get around the problem. Thanks for any help. GP Do you want to signoff PCSOFT or just change to Digest mode - visit our web site: http://freepctech.com/pcsoft.shtml