^^^^^^^anti aliasing is off, what does it do when it is on?
You need to go into where your saved games are which is C:users\(your name)\documents\my games\oblivion. there is a file named Oblivion with your configuration settings. find baallowscreenshot0 and change the zero into a 1. the screenshots will appear inside your data folder in Oblivion\data as a jpeg file.
I'm using Windows 7. It's displayed like this for me
computer > OS (C:) > Program Files (x86) > Bethesda Softworks > Oblivion
or ... > Oblivion > Data that goes into menus, meshes, Music, Shaders, Textures, Video, and all of my mods are also under Data
I'm not sure if this changes anything, just an FYI
Also, I searched my computer for "baallowscreenshot0" and it cannot be found. Any suggestions? I'm stupid and require baby steps.