I have dawnguard installed on my skyrim. Everything is where it should be. I try going on one profile I made, none of the guards talk about dawnguard. Period. I go to where the dawnguard fort is. Mages block the entrance. I died, first time. Then I went of there again, miraculously an orc comes riding in with a horse and tries to kill me for whatever reason. I kill him, steal the horse, run past the mages on the horses and I can something like "Can't enter this area" RIGHT where the quest starts.... Like fort dawnguard doesn't exist. I go on one of my other profiles, a Master Vampire attacks me in whiterun. THEN this dude starts talking about dawnguard. I didn't want to do it on that profile, I deleted the profile, started a new one, STILL no dawnguard. WTF?! I might as well just kill every guard I see. Pissing me off. I have a lot of mods on, perhaps they are interfering with the quest? I'm on PC. Somebody help!