#2
This sounds more like a bug with your hardware/software than with Morroblivion.
You should make sure that your computer isn't overheating, first off. Is this a gaming rig? Do you play any other games on it? If yes, and those games work w/o overheating, than you're ok. Otherwise, if you're installing this on grandma's laptop or something, well...
Another potential cause could be an antivirus program scanning Oblivion as it loads new data into your computer's memory and slowing it down. If you have an antivirus program running, try temporarily disabling it and see if that helps.
Finally, it could be a bad memory module in your PC, or possibly a bad video card memory module (bad hardware). You can test for bad memory with MemTest86+ http://www.memtest.org/
#3
#4
#5
Ive had this happen occasionally. I have to start a new game to get it to work. It doesn't always happen when leaving seyda neen .. sometimes I crash when loading the seyda neen cell. In my case it's a mod conflict.

#1
If you have not got them installed,try the purge cell buffers and purge load buffers mod.
Can`t find a link to it right now but it is on these forums somewhere.And maybe you might have your graphics set to high in oblivion.
But leave the texture size set to Large.