Blue screen

[bluescreenplz]

I have started to encounter major problems with my computer. I keep getting blue screens' of death which occur at random times. I have no clue what's wrong and am not great with computers. I have brought it to a professional, who claimed to have fixed the problem, but hasn't.... I have even re-installed windows 7, but the problem still persists.
Attached you will find the mini dumps and here are some of my PC stats:
ASUS P7P55 LX motherboard
Intel i5 760 Quad core processor
ITB SATA 2 Hard drive
ATI Radeon HD5770

I am at my wits end and would really appreciate some help.
I will gladly try and supply more information if necessary.
(Hope my English isn't too bad I'm German and as you will have noticed I am very bad with computers...)

 

[johnb35]

Download BlueScreenView
No installation required.
Unzip downloaded file and double click on BlueScreenView.exe file to run the program.
When scanning is done, go Edit>Select All.
Go File>Save Selected Items, and save the report as BSOD.txt.
Open BSOD.txt in Notepad, copy all content, and paste it into your next reply.

Meanwhile, I will look at your dump file to see if it helps determine whats going on.