I have faced this error while installing SubSonic(http://www.codeproject.com/KB/database/SubSonic.aspx) in my machine. I have searched on google and found the solution. This is a security issue with the Window 7.
To resolve this issue please open Command Prompt by right and ran as Administor. The move to the installer’s directory. Then run following command on command prompt:
This will successfully install the installer. 🙂