Random BSODs on new PC

Hi everyone.
I'm sorry for my english, but it's not my first language.

System specs:
Windows 7 Home Premium x64
version OEM but installed by me
Hardware aging:
cpu, motherboard, memory, ssd drive - 5 weeks
graphic, psu - 1,5 year
hdd drives, dvd drive - ~5 years.
Hardware is nonoverclocked.
System was reinstalled yesterday (after 5 weeks making problems).

So I shortly describe my problem.
I have BSODs (IMO to often). There is different crashes: 50, a, 19, d1, 3b.
It's no matter system is installed on ssd or hdd. No matter nvidia graphic is installed or not.
BSODs appear in idling or browsing (I don't ran any game yet). But if I ran ie. OCCT Linpack test or furmark test (or more testing software, even a few in the same time) nothing happens.

Think I have updated drivers, but I can't updates windows (because BSOD appears).

I ran memtest (8 passes - no errors).
I ran microsoft's memory check tool in extended mode (6 passes - no errors).
SFC found no integrity violations.
HDD and SSD without errors.
PSU voltage is ok, but HWMonitor don't show +12V line.
Temperature is ok (in stress CPU is 61-63* C, in idle 35*C).

I attach "jcgriff report" and "perfmon report".

I will be grateful for your help.

PS. Linux from flashdrive works perfect.

Crashes point to your Realtek HiDefinition Audio driver (file labelled as Creative Audio Driver), your XBOX USB device, or your display card. Try to update those drivers.

Remove the XBOX device (I believe the driver cannot be updated from past experience), and see if the system is more stable.

For the USB problems...

• Start with USB Driver - General Fix for Problems to resolve the USB issues. Also, USB ports can sometimes enter a safe power state to protect the system from power surges due to USB devices. To reset the USB ports to a nominal power state:
  
  1. Shut down and turn off the computer.
     
  2. Unplug the computer from the wall or surge protector (then remove the battery if it is a laptop).
     
  3. "Remove the computer from any port replicator or docking station, disconnect
     cables to printers or devices such as external monitors, USB memory sticks or SD cards, headset or external speakers, mouse or auxiliary keyboard, turn off WIFI and Bluetooth wireless devices." (Use Hard Reset to Resolve Hardware and Software Issues HP Pavilion dv5000 Notebook PC series - HP Customer Care (United States - English))
     
  4. Hold down the power button for 30 seconds. This closes the circuit and ensures all
     power from components is drained to clear the software connections between the BIOS
     and hardware and clear any corruption in the temporary memory.
     
  5. (If it is a laptop, plug the battery back into the laptop and then) Plug the computer back into the wall. Do not reconnect any unnecessary peripherals; monitor, keyboard,
     and mouse should suffice and be the only peripherals reconnected.
     
  6. Turn it on to reinitialize the software connections between the BIOS and hardware
     

Thanks for advance.
I did as you advise, but problems remain.
Now I have disabled Realtek audio in BIOS, and deleted from device manager.
Meanwhile there are few new crashes. Blueskreenviewer points to problems with files system (drivers ntfs.sys and msahci.sys).
Over a month I trying to resolve these issues and I come to the conclusion that the mainboard is broken. Today I will buy another mainboard and check the behavior of the system.
Today's portion of BSODs, if you do not mind.

Thanks for your commitment, the problem is already solved. Mainboard is damaged, going to RMA.

Great news about it being solved!!

Sad news about the bad board.