BSOD at random times

Hello! Im having BSOD at random times, also sometimes PC justs restarts or the screen like splatters in many colors! The thing is I had BSOD about a month ago, so after trying many things I just took it to the shop, where they changed my MOBO, after runing diagnostics! After that my PC ran just fine for about two weeks, until BSOD returned! Now it likely seems to be my video card problem, because the BSOS points to atikmgad.sys and ntoskrnl.exe. Also I found out in many forums thats my video card ATI Radeon HD5750 and the drivers for it has problems with WIN7 x64! I have tried the following things:
1) Reinstalled Windows
2) Updated all the drivers
3) Ran CHKDSK
4) Reseated my RAM sticks and cleaned them
5) Reseated all the wires form the PSU

I have Windows 7 Ultimate x64, not pre-installed, system age - 2 years, WIN is reinstalled a day ago!

Ok, i'll try that!

The driver installed. The video card is recognized by the system, though it posted some warinings after the install! I added a screenshot and the ATI report! The video card is recognized by the system!

Well, I cant tell just yet! I'll have to run the PC form some time, cause as I stated my BSOD's are showing at random times! For now everything is running fine! I will post an update if BSOD returns, or, hopefully, is gone :)

3 hours running and no problems! Just to make shure I'll use my PC for a couple days, with turing it on/off, before this thread is locked!

PC was running fine for 8 hours! Then I shut it down! When later at the eveing I came back, hoping my problem was solved, I turned on my PC, everything looked fine! Then after a few minutes, while watching YouTube, my screen just droped many colors(see the picture)! I restarted PC, then it did not boot, so I restarted again, then it booted up and droped a message "Enabling Unleashing Mode failed", so I hit F2 "Load deafult settings''! It booted, but when logging in it froze again! So, as previous BSOD where pointing to may Radeon card, I removed it and started with the MOBO VGA! It just droped a BSOD, when loging in in normal mode(see the BSOD report)! So finaly I got in thrugh safe mode to post this! So could it be, that my Radeon drivers still are not working, and not letting me log in in normal mode, with my MOBO VGA? Or it could be my Hardwares fault? This is driving me nuts!

Ok, I again deleted Readeon drivers with DriverSweeper, put back my radeon, strated up my PC! No freezes, BSOD! So now PC is wokring, but what drivers should I install? Or what should I do?