9) Rebooted and got the dreadful BSOD. It turns out that a UEFI installation results in a BSOD if you install the Intel HD 3000 driver BEFORE the SP1. See the discution of the problem here:
BSOD immediately after installing...: Intel Communities.
- Important: In order to avoid resinstalling Windows again, do steps 1 through 7 and proceed as follows:
10) Check for updates and make sure you uncheck Intel HD 3000 driver. Install other updates and reboot.
11) After the first update, the reboot may take a while (mine got stuck and the Starting Windows stage). Then, check for updates again. See if you've got SP1 and again uncheck the Intel HD Driver. Install SP1 along with other updates. Reboot.
12) Then I installed the Intel HD Driver, and guess what, the screen got much prettier than it was with the Lenovo driver. The color profile and sharpness was much better and this made the screen much more usable than it was out of the box (you've probably read the horror stories abot the T420's screen. Here is a thread where I comment on the issue:
http://forum.notebookreview.com/lenovo-ibm/571621-t420-arrived-first-impressions.html ).
13) I checked for updates again and have hidden the Lenovo HD Driver update.
- Important: If you don't want the horrible default screen quality of the T420, please, make sure you don't install the Lenovo HD Driver. Furthermore, for some reason, because of the Intel Hd Driver, the WEI for Aero performance increased from 4.4 with the Lenovo driver to 5.2.
Problems? See this thread at archive.org.
