Naah, you're not a noob. Everyone starts somewhere.
OK, Kivan hangs out on the Bethesda Forum. He & Quarn have a ton of fame for making the "Unofficial Patches" that fix thousands (Yes, 1,000s) of bugs & glitches left after Bethesda issued their final Official Patch (1.2.0416).
First of all, make sure your game is Official Patched to 1.2.0416.
The UOP fixes game problems.
Unofficial Oblivion PatchThe UOMP fixes any DLCs you may have.
Unofficial Official Mods PatchThe USIP fixes SI bugs.
Unofficial Shivering Isles PatchOn the first link for the UOP, download both the 3.0.0 Self-Installer and the 3.0.1 Hotfix Self-installer. Run them in that order.
For the UOMP, (stay with self-installers, btw) only activate the fixes for the DLCs you actually have. If you try to activate ones you don't have, you'll be in for a lot of problems.
FCOM Helper is a utility for Oblivion that will Load-order your mods based upon what they actually change within the game.
FCOM HelperPlease read the Description for it closely, as there is a URL in there for you to copy & paste into your address bar so you can get the Microsoft C++ files it needs in order to run on your PC.
You run it from the Oblivion\Data folder by the .BAT file (not the .EXE!!). If you've done everything correctly, Notepad will open up with your load-order results, and then you'll notice a quick flash (text files being written to your drive).
OBMM is the Oblivion Mod Manager. A fine utility to use.
OBMM DownloadSelf-installer again.
It needs Microsoft .NET Framework Version 2.0 to run. That should be easy enough for you to find.
(btw, after installing Microsoft .NET Framework Version 2.0, run Microsoft Update & click the "Custom" button. This is so you will see any patches or security fixes you'll need to install for it.)
You run OBMM after FCOM Helper is finished, then close it after about 10 seconds. Reason: Oblivion uses a hidden file (Plugins.txt) that lists all your DLCs & mods. It will load using the order in that file. OBMM will modify that list so it will have the FCOM Helper load-order.
Don't forget to activate the UOP, UOMP, & USIP .esp files so Oblivion will run them!
Finally, since you're using a 7-Series card (like my 7800 GTX), you'll need to go into Windows Explorer, (C:\Program Files\Bethesda Softworks\Oblivion\Data\Meshes\Dungeons) and go through all the subfolders & files inside. Look for any "Cobweb.nif" files.
Delete all of those Cobweb.nif files. Won't hurt your game. The problem is those files are basically telling your card to do something it can't (8-Series & higher). Just make sure they say "Cobweb.nif". Any .nif files other than Cobweb are OK, so leave them be.