I really love this game but when I played it in my lap top (Windows 7) or my old computer
(Windows XP) it would lock up when I would quit the game. Has anyone had this problem or know how to fix this????
The only way to get out of this was to reboot the computer.
I don't want to install this on my new computer unless I can find a way to correct this problem.
Haven't played this for a while but it didn't do this all the time.

Same answer as to every DOS game: Run it in DOSBox. :)

If it is a DOS game then GOG provide DOSBox as part of the installer (it is optional, though).

I have the same problem sometimes. Press Ctrl+Escape to minimize it, then right click the program on the task bar and choose "Close" from the pop up menu. This should close the program without making your computer freeze.