Anyone know how to get this installed on PC (with Skyrim already installed)? The Sticky above seems to be for XBox not PC. Inserted the disc, no option to upgrade, only play / reinstall / uninstill. TIA.

I would venture a guess that you must first uninstall Skyrim, then install the LE.

Do you have all of the DLCs already? Because if you do then the Legendary Edition doesn't offer anything new, it isn't even a separate application in Steam just a store bundle with the game and all DLCs. If a PC owner already owns the game and any of the DLCs there is no point whatsoever to buy Legendary.

No, just the original Skyrim - took a break till the inevitable bundled edition came out.

You'll need to add the new CD key to Steam via the Add Game function in Steam.