Windows 7: BSOD when on youtube restarts

Hello, i been having BSOD's every fornight or so, and the pattern ive realised is usually when im on youtube.

This may be a cooincidence but this is what ive gathered. My mother and i get BSOD's when on youtube... weird...



btw its not when i go on youtube intantly, its just sometimes, so i can be on youtube for many days, but i think once a fornight, when on youtube... it happens.

before i had a problem with BSOD for the ram, so i replaced that generic ram unbranded, with corsair 4gb xms3 1333mhz

System spec
AMD Phenom ii x4 955 (no over or under clocking)
Corsair cx 430W psu
4gb 1333 corsair xms3 ram
ATI Radeon 1gb 6770
MSI 870a g54

windows 7 64 bit

home build PC

3 to 4 months old pc, and installed once

To give you more information, you can read this thread, although its quite old.
Many errors on Memtest86+ AND BSOD - Memory - Motherboards-Memory

but yeah i dont know what it is... can you help me? thanks