Lockup and restart, no BSOD

Hello again BSOD Help and Support... WE MEET AGAIN! hahaha
My pc locked up once and crashed to restart on the reboot after the lock up (happened both while playing Dota 2)

What i am doing to fix (w/ results):

• sfc /scannow CHECK (No integrity violations)
• Malware scan (Found 4 infections)
• Windows Update (Latest and Up to date)
• Updating Software (Updated)
• Updating Drivers (Updated)
• PC Cleanup
• Defrag
• Disk Check
• Running HDD Diagnostics (Passed SMART)
• Checking temps (High temps, Changed CPU Cooler)

I also attached the files from the SF Diagnostic Tool incase there is something in it (sorry im such a newb hahaha) and also specs below :) THANK YOU IN ADVANCE

Code:

Host Name:                 IANDREXP
OS Name:                   Microsoft Windows 7 Ultimate 
OS Version:                6.1.7601 Service Pack 1 Build 7601
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
Registered Owner:          user
Registered Organization:   
Product ID:                00426-OEM-8992662-00008

Ian, you have an Alienware OEM on a retail motherboard. How did you install Windows?

Golden said:

Code:

Host Name:                 IANDREXP
OS Name:                   Microsoft Windows 7 Ultimate 
OS Version:                6.1.7601 Service Pack 1 Build 7601
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
Registered Owner:          user
Registered Organization:   
Product ID:                00426-OEM-8992662-00008

Ian, you have an Alienware OEM on a retail motherboard. How did you install Windows?

Really? I dont know how that happened
EDIT: Windows 7 was already pre installed when I bought my pc from a local shop