Same problem here... Data files option greyed out too, here's what I tried: Game-wise >Made sure BOTH Skyrim.Prefs.ini files had the =1 line of code. >Changed both lines of code to 0, saved the file, and back to 1, saving it again. >Tried the same with setting it to 0 before starting the launcher, then changing it to 1 with launcher on, and re-opening launcher. >Tried both of those multiple times. >Deleted spare Skyrim.Prefs.ini file I had in another folder as a backup in case I f***ed up. >Checked if I have the latest patch for Skyrim. Mod Manager-wise >Unsubscribed from ALL mods on Steam. >Made sure mods were actually checked in NMM itself. >Activated mods in both the Mods and Plugin tabs in NMM. >Updated NMM. >Downloaded SKSE. >Made sure SKSE is working properly. PC-wise >Moved Steam to a folder outside of program files, as per instruction on the Nexus Wiki. >Installed mods via said Wiki instructions, minding the install instructions on the mod itself. >De-installed, then re-installed the mods. >Went with a mod I used before on Steam so I knew I wasn't missing anything. >Checked if my PC was properly updated. I don't know what in Oblivion is causing this, but I'm pretty stumped on what it could be here. :confused: If it's relevant: I have the Steam version of the game, and I'm running Windows 7. My downloaded DLC is Hearthfire and Dawnguard, which won't load either, even without mods. The Data Files option won't budge either, no matter what I try.