To build the drivers: 

1. Install the following: 
?Microsoft Windows Driver Kit (WDK) for Windows Developer Preview 8141 or newer
?Perl 5.0 or newer 
?Visual Studio 2010
2. Run the buildDriver.pl script (found in QMI\win\qcdrivers\) using the following syntax: 

Perl buildDrivers.pl [Checked]
 
[Checked] is optional parameter to build debug drivers

Ex: Perl buildDrivers.pl
Ex: Perl buildDrivers.pl Checked

For details about building the drivers, see the content of buildDriver.pl.