BSOD crashes on internet activity randomly

Hi,

I am new here and have a problem with my custom build pc that crashes randomly the last few months, maybe it began after the installation of Windows 8 on my pc (now back on W7 though, hoped it would fix the crashes).
The crashes seem to happen when I am using a program that requires my internet connection (browser, teamviewer, utorrent), but it happens very random, when a program is in use for a few hours is could still happen.
I tried to swap some hardware to solve the problem, I now have a new Graphics card and I tried another PSU for some time, which did not solve the problem.
according to memtest my memory seems fine (which btw was stupid to buy because my pc can only handle to DDR-1600).

Can someone please help me to solve this problem, because these crashes are getting annoying.

Kind regards,

Jack

Forgot to mention that when I am gaming, the pc never crashes..

Hi jackkiej.

Install Service pack 1 and all other windows updates. Otherwise the system will remain vulnerable to threats.

Code:

Windows 7 Kernel Version 7600 MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 7600.17273.amd64fre.win7_gdr.130318-1532

Learn how to install Windows 7 Service Pack 1 (SP1)
Service Pack and Update Center - Microsoft Windows

Report us for any further BSODs after updating to SP1.

HP/MSI