BSOD playing League of Legends

HP Pavillion Laptop keeps crashing when playing League of Legends, tried the SF diagnostic tool and here is the uploaded folder!

Info:
Windows 7 Home Premium
Manufactuer: Hewlett-Packard
Model: HP Pavillion dv4 Notebook PC
Processor: AMD Turion(tm) II Dual-Core Mobile M500 2.20GHz
Installed Memory(RAM): 4.00GB (3.75 GB usable)
System Type: 64-bit Operating System
Pen and Touch: No Pen or Touch Input is available for this display

Code:

Host Name:                 BCAO-PC
OS Name:                   Microsoft Windows 7 Home Premium 
OS Version:                6.1.7600 N/A Build 7600

Update Windows 7 fully - this may take a few hours. Reboot.

When you get new BSOD's after updating, follow this:

1. Download this .BAT file to your desktop

Download


2. Right-click the .BAT file and 'Run as Administrator'
3. Locate the .ZIP file created on your desktop, and upload it here in your next reply.

Code:

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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck A, {0, 2, 1, fffff80002c9518f}

Probably caused by : ntkrnlmp.exe ( nt!KeReleaseSemaphore+9f )

Followup: MachineOwner
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Run MemTest86+ for a minimum of 8 passes, or until errors appear

RAM - Test with Memtest86+