External monitor not working after installing latest NVIDA drivers

I have a mid-2010 MacBook Pro. I installed bootcamp and Windows 7 x64. I performed all the Windows updates then installed the Apple Bootcamp driver CD. Everything was working fine and I was able to connect an external LCD monitor using a mini display port to HDMI cable (the LCD only has HDMI ins).
I then came across a piece of Windows software that requires the latest production NVIDIA drivers so I went to the NVIDIA web site and downloaded their installer for the GT330M which is the chipset in this MacBook Pro.
The NVIDIA installers ran fine and installed version 275.33 of their drivers, however, when I hook up the external display the primary display goes black and the external monitor simply cycles through all the inputs like it can't find a signal. When I unplug the mini display adapter from the MBP the MBP screen returns to normal.
Thoughts?
TIA,
-Noah
PS. Windows 7 *****. Took over 3 hours to install and apply all the Windows updates with countless reboots. Lion took under 20 minutes to fresh install.

Well low and behold I tried clearing PRAM again and I reset my monitor to factory defaults. Reconnected my monitor and the thing works now. Very strange but I'm Happy that it's working again. *WHEW*

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Well low and behold I tried clearing PRAM again and I reset my monitor to factory defaults. Reconnected my monitor and the thing works now. Very strange but I'm Happy that it's working again. *WHEW*

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