Re: Installation Error
What is it you're trying to install? First off I'd make sure no other programs are running, and that you're only trying to do one install at a time. This may also mean disabling some startup programs that might be interfering with what you're trying to install.
It's also possible you're installing to a directory that's not empty - make sure you're not trying to overwrite something that's already in there. If in doubt try and install to another (new) directory.