PE-12 crash at start-up after Windows 8.1 update

Question

PE-12 won't start-up- crashes at start-up following a Windows update.
Existing projects and new projects PE-12 will not open.
my laptop specs:
TOSHIBA Satellite P75-A
WINDOWS 8.1
Intel(R) Core(TM) i7-4700MQ CPU@ 2.40GHz 240GHz
8GB RAM
64-bit OS, x64-based processor

Answer 1

That is OFTEN caused by a Windows DLL change that renders your graphics adapter driver out of date
•What is your exact brand/model graphics adapter (ATI or nVidia or ???)
•What is your exact graphics adapter driver version?
•Have you gone to the vendor web site to check for a newer driver?
•For Windows, do NOT rely on Windows Update to have current driver information
•-you need to go direct to the vendor web site and check updates for yourself
•ATI Driver Autodetect http://support.amd.com/en-us/download/auto-detect-tool
•nVidia Driver Downloads http://www.nvidia.com/Download/index.aspx?lang=en-us
ALSO
Dual video problems - Do you have dual graphics adapters?
Go to the Windows Control Panel and select Hardware and Sound and then select Device Manager... In Device manager you click the + sign to the left of Display Adapters... and see if 2 are listed
IF YES, read below
-http://helpx.adobe.com/premiere-pro/kb/error---preludevideo-play-modules.html
-http://forums.adobe.com/thread/1001579
-Use BIOS http://forums.adobe.com/thread/1019004?tstart=0
-link to why http://forums.adobe.com/message/4685328
-http://www.anandtech.com/show/4839/mobile-gpu-faceoff-amd-dynamic-switchable-graphics-vs-n vidia-optimus-technology/2