Re install your Windows DVD
Restart the computer and hold OPTION KEY
When the icons display choose the Windows DVD.
The install scrren on the Windows DVD has some options below the Install now button in the center.
They are on the lower left.
I forget what they say but they give you various options.
One is a command prompt.
Go there and try these commands: C:
Then try:
SFC /SCANNOW
That will check if all the Windows systems got installed correctly.
If you get an error you will probably have to reinstall Windows 7
Are you sure you have a Full Install disk of Windows 7 and not an upgrade.
Apple has so fubared BootCamp with this update I am schocked!