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Apparently Johnny can't Google, either. Browse http://www.thefreecountry.com/compilers/basic.shtml, Mr. Brin, and pick your poison. If all that thinking is making your head hurt, surf over to http://www.yabasic.de, where you will find what you say you are looking for - a simple BASIC interpreter to use in a Windows environment.
Ironically enough, there are more BASIC products available for the Linux and Unix worlds - which makes sense, as command-line computing is so much more common in those environments.
Jared Hecker