Haha. FIRST Vista problem.
The Windows Installer Service could not be accessed. This can occur if the Windows Installer is not correctly installed.
Now, I tried to install a current version off of Microsoft's website, and the installer tells me:
Not enough storage is available to process this command.
I have TONS of HD space, and 4GB ram.
I've googled the shit out of it, and I've yet to find anything that works.
Oh, and I CANT install/uninstall anything.