I have seen this error message when you try to uninstall FCS client software. I don’t know the proper resolution for this issue. But I have used Windows Installer Cleanup Utility to successfully uninstall the FCS Client software.
http://support.microsoft.com/kb/290301/en-us
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About Santhosh Sivarajan
Santhosh Sivarajan is a Technical Architect in Houston, TX. His main focuses are Microsoft Infrastructure and Security Technologies. He is MCTS, MCSE (W2K3/W2K/NT4), MCP+I, MCSA (W2K3/W2K/MSG) and CCNA certified. His expertise includes Active Directory, Exchange, Migrations, Microsoft Clustering, Microsoft Security, RMS, MOM, LCS, ISA Server, etc. If you wish to send an email, he can be reached at santhosh@sivarajan.com. Blogs: http://santhoshsivarajan.blogspot.com/