» Sun Oct 14, 2012 6:20 pm
Shut down Steam, navigate to its directory, and do one of three things: move ClientRegistry.blob somewhere outside of the Steam directory tree, rename it to something like ClientRegistry.blob.old, or delete it. Once you do that, you can start Steam up again and it should regenerate it. If the problem persists, the Steam forums are really your best option as it sounds like a Steam issue and not a Skyrim issue.