Windows 7: Random BSOD's and total freeze's

Hi everyone,

In the last week i have randomley BSOD's and total freeze's, just in windows and while i browsing on internet, never in games. So yesterday i decided to reinstall win 7, and bsod's and freeze's are still here.
In last year i did not install new hardware, so this is not the problem, i try remove ram and replace it 1 by 1 and this still happen. Everytime on bluscreen is diferent error message IRQL_NOT_LESS_OR_EQUAL , MEMORY_MANAGMENT,PAGE_FAULT_IN_NONPAGED_AREA or just total freeze.

I know that my computer is not a new, but before bsod's it work great.

Sorry for my bad english

PC specs:
Motherboard: MSI MS-7519
CPU:Q8200
RAM: 8GB
Graphic:NVIDIA GeForce GTX 560 Ti 448

Thanks in advance!

Msinfo32:
Please go to Start and type in "msinfo32.exe" (without the quotes) and press Enter > Save the report as an .nfo file, then zip up the .nfo file and upload/attach the .zip file with your next post. Also, save a copy as a .txt file and include it also (it's much more difficult to read, but we have greater success in getting the info from it).

If you're having difficulties with the format, please open an elevated (Run as administrator) Command Prompt and type (or copy/paste) "msinfo32 /nfo %USERPROFILE%\Desktop\TEST.NFO" (without the quotes) and press Enter. Then navigate to Desktop to retrieve the TEST.NFO file. If you have difficulties with making this work, please post back. Then zip up the .nfo file and upload/attach the .zip file with your next post.

systeminfo:
Please open an elevated (Run as administrator) Command Prompt and type (or copy/paste) "systeminfo.exe >%USERPROFILE%\Desktop\systeminfo.txt" (without the quotes) and press Enter. Then navigate to Desktop to retrieve the syteminfo.txt file. If you have difficulties with making this work, please post back. Then zip up the .txt file and upload/attach the .zip file with your next post.

Please post this report before we begin: Windows Genuine and Activation Issue Posting Instructions