MTM.MTMCDAI.386 - stops computer from opening windows 98

I am wondering if anyone knows why I am getting a message which states the MTM.MTMCDAI.386 is missing? It also says that I may have uninstalled a program without using an uninstall program. When I start my computer a message comes up under a DOS window saying I have a choice to either enter setup or press the F1 key to continue. When I press the F1 key I receive the message above about the file and to press enter to continue. When I press the enter key Windows starts. The other problem I am having is that I can not shut the computer down without turning off the power. If I go into the msconfig utility the lower end of the screen has about 60 lines with "run =" on it and nothing else. The last line says run = uninstallms.exe. I believe this may be related to my the computer not shutting down. Just before Windows starts I can see the MS-DOS window come up for a breif moment - probabley executing something. This might have something to do with my problem. I sure would welcome any information you have that could help me solve my problem. I bought this computer from a local shop where they build new computers and trade used ones........can you guess mine is a used computer.
Thank you