If you have a MacBook Pro (2011 Model)¬† with an Intel HD 3000 or HD 4000 integrated graphics card you may find that the Apple Bootcamp drivers and the latest drivers from Intel DO NOT allow you to connect via a Thunderbolt to VGA adapter to a Projector.¬† If you find yourself on the Mac forums with this issue and having rebooted with connection connected, and having tried a variety of “fixes” with no success the answer is the Windows driver. ¬† You need a specific Intel HD 3000 driver which is no longer posted on Intel’s site but I did locate a working driver with same revision on Lenova’s website.¬† I can confirm it works on the MacBook Pro 2011 running Windows 7¬† Pro.

Again this driver is actually from Lenovo but will work on MacBook Pro models 2011 models.  It is the only driver revision that I have found that allows connection with Thunderbolt to VGA with any projector.

IntelHD3000

Strangely this specific driver revision has been pulled from Intel’s website.¬† You can now only download the newer driver which does not work with all projectors / although it does seem to work fine with secondary LCD displays.