I did the quest in Morthal about the house burning and the little girl ghost, defeated the master vampire. Now when I entered the master vampire's lair, certain areas weren't there, just an open sky void. I payed no attention, just kept at my quest. After all that, the follower for that quest stayed in place. But anyways, after that quest, I can NO LONGER enter the Blue Palace in Solitude, my Solitude house or even explore the swamp around Morthal, without it freezing. The Rift also freezes now. Anywhere else is fine, however. I can walk forever from Solitude to whiterun, without a freeze. But if I even try exploring around Morthal for even 2 minutes, it'll freeze completely and have to restart my 360. When I try and load my house or the Blue Palace, it'll instantly freeze everytime on the loading screen. I done this numerous times to try and narrow down what's really going on, but found nothing that could be causing it. My house was loading fine even after that Morthal Quest (but Blue Palace wasn't), but then after I got the dog to lead me to Meeko's Cabin, I brought him into my house and told him to wait. After that, I can't enter my house (even though it said the dog left on the screen).
My file size is quite large (18 mbs, started doing this, this morning at 17mbs). I'm thinking it might be a file size issue. I tried to unload a lot of keys I had, but it didn't work. My game is indeed installed. I also tried those freeze up spots after taking the game off of my hard drive, didn't work. Cleared my cache too, nothing. I started a brand new file, went to Solitude and I was able to enter the Blue Palace and explore the Morthal are without any problems. So, I know it's my original file, something happened. It's either my file size or something glitched with that Morthal quest, I mentioned.
I came here to see if anyone else had this problem and if they resolved it? What's something that I might be able to try that I haven't yet? I do have a lot of quests that I didn't finish yet, because I was being a "good guy" and didn't want to do the evil-ish quests and let them be... Should I try and unload those quests, to try and lessen the load on the game file??? Any help will be appreciated, I would love to go through the main quest with my level 59 character, that I worked so hard with!