Computer froze at random time, Event Log uploaded

Hi, I've been experiencing random freezes of my computer and cannot find a way to solve the problem.

I've tried,
Using different RAM sticks and tried different RAM sockets
Reinstall OS
Ran Crystal Disk Info, all good
Update Windows 7
Update Video Card driver
Tried using different power cable on my HDD
The computer is not overheating at all (CPU 45, GPU 33 ish in Celsius right before freezing)


When my computer freezes,
it has no sound
the screen remains at the last second right before it froze
mouse doesn't move
Num Lock light went off
Tapping Tab and NumLock doesn't have any lights
Front Case HDD activity light stays dark

I ran out of ideas on what to try.
The freeze happens after I use my computer for awhile.
Can someone help please?

My specs:
Win 7 64bits Home Premium
Intel IB i5-3570K
ASUS P8Z77-V
Corsair Vengeance 1600 16G
EVGA GTX 670 FTW 2G
PSU: Corsair TX750
500G WD Blue HDD

Arc said:

Log Name: Application
Source: Microsoft-Windows-User Profiles Service
Date: 14-09-2013 AM 08:38:31
Event ID: 1530
Task Category: None
Level: Warning
Keywords:
User: SYSTEM
Computer: Nspear-PC
Description:
Windows detected your registry file is still in use by other applications or services. The file will be unloaded now. The applications or services that hold your registry file may not function properly afterwards.

DETAIL -
1 user registry handles leaked from \Registry\User\S-1-5-21-3447640551-3659756363-3628519573-1000:
Process 4144 (\Device\HarddiskVolume2\Program Files (x86)\Avira\AntiVir Desktop\avguard.exe) has opened key \REGISTRY\USER\S-1-5-21-3447640551-3659756363-3628519573-1000\Software\Microsoft\Windows NT\CurrentVersion\Winlogon

So the first attempt should be uninstalling Avira.

Uninstall Avira. Use Microsoft Security Essentials as your antivirus with windows inbuilt firewall, and free MBAM as the on demand scanner.
Download, install and update those, and then run full system scans with both of them, one by one.

Let us know the results.

I've removed Avira Antivirus, and reboot the system.
Downloaded Microsoft Security Essentials and Malwarebytes Anti-Malware

mbam did not find anything. (included the txt file for the result)
however when I installed MSE, it did a quick scan and found a Trojan, then I removed it!

I haven't experienced any freezing yet, but I will update this thread if anything happens.

Thank you!

Unfortunately, the freezing happened again a minute ago while I was using chrome.

This time, it froze the same way, and I had to shut it down, but when I was trying to boot, the motherboard DRAM LED was on. I tried to remove A1 and B1 channel RAM to boot and it worked.

Updated the new event log.

I'm not sure what happened...

The RAM LED Light came on before as well...

(I had the DRAM LED light issue before, so I rmad my motherboard, and I just got it back yesterday)

Arc said:

Test your RAM modules for possible errors.
How to Test and Diagnose RAM Issues with Memtest86+
Run memtest for at least 8 passes, preferably overnight.

Should I run it with all 4 sticks inserted or just 2 in the first run (I'm using 2 in A2 B2 right now).

Arc said:

Test with the combination that crashed.

OK! Thank you !