So I'm experiencing this incredibly annoying bug that I can't fix, no matter what. I've completely uninstalled the game many times and it still happens.

It's hard to explain, so here's screenshots.



A screenshot of me staring at a few houses in Goodsprings.
http://filesmelt.com/dl/ScreenShot366.bmp


But then, if I look left diagonally, this happens. My cursor is visible in the corner (had to be MS painted in, the screenshot didn't include the cursor). If I attempt to click to shoot or select something when the cursor is showing, the game minimizes itself and refuses to open back up. Will someone help me fix this?
http://filesmelt.com/dl/ScreenShot456.bmp

Sounds like a background app is doing something.
No idea what you have installed.

clean boot link:
http://support.microsoft.com/kb/929135

Windows XP steps are similar.