BSOD trying to open file context menu directly after installing 7zip

I get the attached bluescreen (BSOD) after doing following actions:

• Starting a VirtualBox snapshot with ROS 0.4.14 RC24 (VBox additions, firefox and flash installed)
• Installing 7zip from RAPPS (default settings)
• "Installing" C++6 from RAPPS into the folder "C:\Installiert" (which was created earlier)
• Now, when I open this folder and directly right-click onto the copied vcredist.exe file in order to extract it, I get the BSOD in win32k.sys.

Had this three times and caught on attached video, so it is reproducible in my setup. Not sure this is reproducible in general.

Notes:

• You don't actually need the C++ library. You can use any other archive, a right click will cause the BSOD.
• The BSOD does not happen if the system is rebooted after installing 7zip, so maybe the 7zip explorer extensions are not yet correctly working until after a reboot.