Okay, the game auto-updates even though I had auto-update not selected....that's one thing, but:

When I get into the game, my mouse scrolling for 'look up' or 'look down' is so slow as to be almost non-existant.

My mouse works fine, otherwise...so, this now means that the game is unplayable for me....

I don't know what to say...that doesn't consist of four letter words and insults...

*facepalm....

Try undoing the mouse sensivity changes you made in your ini files.

this issues was brought up a hour ago. if changing sensitivity doesnt help, try delete the ini file.