what do you mean by "what is install in [your] computer"? you can see all the programs installed under Add/Remove Programs in the Control Panel. you can see whatever's running with the task manager.
creager this is what i use. Belarc Advisor 7.2.1.7 Publisher's Description: Belarc Advisor builds a detailed profile of your installed software and hardware, including Microsoft Hotfixes, and displays the results in your Web browser. All of your PC profile information is kept private on your PC and is not sent to any web server. Released: November 16, 2006 Publisher: Belarc, Inc. Homepage: Belarc Advisor License: Freeware OS Support: Windows (All) download here http://fileforum.betanews.com/detail/Belarc_Advisor/1042897635/1
Ireland, Thank you very much, that is exactly what I was Looking for. Had a hard drive crash and lost my old copy. Bill