When I tell yum to update i get this error, help?!?!?

What is the background ? Have you only just installed ? Is this a new error, or has it never worked ?
What files are listed in /etc/yum.repos.d ?
There should be a fedora.repo and a fedora-updates.repo at the least.
If they are there, what is their contents ?

Alternatively, open System > Administration > Add/Remove Software and using the System menu, choose Software Sources. This will list your repos, with a check mark beside the active ones. If you have the two repos I mentioned above, make sure they are checked but no others.

Brand new installation on brand new PC. It's a work PC, so I'm unsure if others got yum working before me or not (unlikely though). I added the RPMfusion repositories and tried to update; got some error (can't remember what it was now). Under google's advice I used the "yum clean headers" and "yum clean all" commands. and now all yum tells me is what a posted previously.

I will post the contents of /etc/yum.repos.d tomorow morning when i get to work.

It's telling you that you still have the 'Install Media' set as the primary rpm src; perfectly normal just after an install. You cna disable it through the menu specified above by smoker.

So unchecking everything except those mentioned by smoker didn't work but I removed the packageit-media.repo file from the /etc/yum.repos.d directory and now yum works fine.

ps. I only moved the packageit-media.repo file instead of rm-ing it incase it turns out to be vital to the safety of human kind or something. so is it ok to just delete it?

thanks for all the help!