Hi! I have completed Oblivion and Knights of the Nine add-on or expansion. Now I can get to the gate of Shivering Isles, but when I am supposed to enter and fight the Gatekeeper, there is no way to enter and if I try to go back the game crashes.

I have a pretty new PC with NVidia, etc., and had no trouble running Oblivion on Win 8. Any help will be greatly appreciated!

Let's wait for another moderator, who can move you over to the Glitches section of our forum.

OK. Thank you - I should have thought of that!

There might be an answer in this thread
http://forums.nexusmods.com/index.php?/topic/348795-shivering-isles/

I finally got it running. I deleted the entire program with the exception of saved games and re-installed. It is occasionally crashing and the other problem is one that I had noticed in "KOTN" quests and that is any doors or gates open VERY SLOWLY. However annoying, the game still plays. Any advice on the slow doors and gates?

I googled this problem and apparently it is quite common. I did find this, where you can read about some possible fixes.

Thank you. I will try that!