So the other day, i was playing Dawnguard and having a great time, suddenly the game closes itself, and steam starts installing an update. (which is always annoying, btw) when the update was done, i started the game up again, and pressed Continue. i then get an error:

"This save relies on content that is no longer present. Some objects may no longer be available. Continue loading? Yes|No"

i'm not getting this on every save i have. i tried loading a save, and it loads just fine, but i'm worried about what the error was referring to. any ideas?

_____
Specs:

Intel Core i5 2410M @ 2.3GHz
6GB RAM
nVidia GTX 560M
Driver Ver 301.42
Win7- 64Bit


EDIT: Got an answer on the Steam forums, and it turns out one of my mods had disabled itself (EnchantingFreedom). re-enabled the mod, and the game loaded normally.
close thread, please