Trouble upgrading to CUDA 2.3

For some reason, every time I install the new Nvidia drivers (v 190.38 or 190.62), Visual Studio 2005 hangs whenever I load a solution. The only way I can get VS2005 to behave normally again is to revert to driver version 185.85. I’m running Win XP64 on a quad core Intel cpu with 2 GTX 280’s. I tried briefly upgrading to VS2008, and that seemed to have no issues (but I can’t transition to VS2008 quite yet since the rest of the team is still on VS2005).

Anyone have any ideas why this could be happening?

Now VS2008 also freezes with the 190.* drivers. This is really baffling.