Window's 7
Download the Nvidia drivers. I'm assuming that's what you have as that seems to be the only ones which have problems.
As for loads and hangs, check to make sure Windows Defender and something else aren't butting heads. I had to make my windows account passworded so I could turn off most of the security junk.
Those might be it, might not.
Nope. Been using it since its beta, without a problem.
You may want to post up in the tech forum.
7 has been fine for me.
total kick to the gut

This is like having Ra's Al Ghul show up at your birthday party.
Try booting the game in safe mode {there's a check box in the launcher} and turning down all options, and see if the game runs normally then. If so, then set everything back to your preferred levels.
Using 64 bit Windows 7 here (and 64 bit Vista before that). Haven't seen the issues described in the OP. Like others have suggested, try updating your GFX drivers and/or trying the game in safe mode. If that's no help try the Tech & Support forum.
Octavian Vanguard
@ohmsEU and @ohms 2
Badging character: Bimble on the Union server, Badgehunter.com and City Info Tracker.
Anybody else having issues? My husband downloaded it yestrday and since then I have had issues. It acts like it doesn't want to load, if it does it takes forever then the screen is all messed up to were I can't see anything but the chat box all over the screen so all there is is jumbled up words on the screen, you can HEAR the game and all just can't see it! Is this an issue with windows7 ??