Toshiba Qosmio - BSOD

Hi,

From time to time I have troubles with my PC and I get BSOD.
Today for example, I get this BSOD on windows start.

I don't know how to troubleshoot this problem so I need your help.
I upload all the needed files that w7f diagnostic tool grab.

Thank you in advance for your help.

Best regards,
Iveta Georgieva