Everything was normal with my one-year-old AsusG75VW There were no problems at all, but then...
About one week ago, Windows asked me to install just regular automatic Windows update and installed it. After this I have been had these weird problems like:
- Nearly every game crashes or I can't even run it
- Can't install or run new .exe files
- Software crashing
- nVidia GPU driver lost connection
etc...


Example when playing BF3 there comes this "DirectX... badly formed commands..." and playing Bioshock Infinite, Far Cry 3, AC4, Skyrim.. they just crash and I can't close the programs. Or I can't even run example Planetside 2...
And I noticed this .exe problem when I tried to run the latest Battlelog plugin, it simply did nothing.
Firstly I thought I have a virus, although I haven't visited any untrusted sites or downloaded anything random files from untrusted sites. So I ran Full System scan on Norton Internet Security and it didn't detect anything.
After this I installed my drivers again, ran programs on compatibility mode, without any change.
Well I read from the amazing world of the wide web that some people have fixed the "DirectX" problem on BF3 by setting down values of GPU so I opened the good old EVGA Precision X and it said: "Failed to initialize display driver wrapper!"

After all this I did the DxDiag and there was nothing unusual except: "DirectX setup parameters: Not found"

------------------
System Information
------------------
Time of this report: 3/26/2014, 15:05:58
       Machine name: ASUSLEEVI
   Operating System: Windows 8.1 64-bit (6.3, Build 9600) (9600.winblue_gdr.131030-1505)
           Language: English (Regional Setting: English)
System Manufacturer: ASUSTeK COMPUTER INC.
       System Model: G75VW
               BIOS: G75VW.218
          Processor: Intel(R) Core(TM) i7-3610QM CPU @ 2.30GHz (8 CPUs), ~2.3GHz
             Memory: 8192MB RAM
Available OS Memory: 8144MB RAM
          Page File: 3505MB used, 8095MB available
        Windows Dir: C:\WINDOWS
    DirectX Version: DirectX 11
DX Setup Parameters: Not found
   User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
    DWM DPI Scaling: Disabled
     DxDiag Version: 6.03.9600.16384 64bit Unicode


------------
DxDiag Notes
------------
      Display Tab 1: No problems found.
        Sound Tab 1: No problems found.
        Sound Tab 2: No problems found.
          Input Tab: No problems found.

So what could be the problem?
My specs:


http://www.asus.com/ROG_ROG/G75VW/


Intel® Core™ i7 3610QM Processor
Windows 8.1 Pro
750GB 5400/7200
Nvidia GTX 670M 3GB


Feel free to ask me more information if needed