BSOD And Crash During Encoding With Handbrake

I recently got into ripping Blu-ray movies and encoding them. However I have recently had a few blue screens with restarts. I use MakeMKV and it usually runs fine and doesn't give my problems. However, I have had problems encoding the MKV files with Handbrake v0.9.5. Here are my system specs:

Windows 7 64-bit Pro SP1
Intel Core i5-2500K (overclocked to 4 GHz)
8GB Corsair Vengeance RAM (Model CMZ8GX3M2A1600C9B)
ASRock Pro3 Gen3 Mobo (latest BIOS update 2.30)
Mushkin Chronos 120GB SSD
Seagate Barracuda 1TB HD
Nvidia GTX 560TI graphics card (slightly overclocked,can't remember speed)
Cooler Master Hyper 212+ CPU cooler

The case also has plenty of fans (7 to be exact). 2 intake fans in the front, 1 intake in the side, 1 intake on the front of the cooler, 1 outtake on the rear of the cooler, and 2 outtake on the back and top. So the tower is staying cool. I'm running AXTU Hardware Monitor during the encoding and temps are staying steady around 50C, which I've heard are normal. The encoding is about 50% now and so far no crashes or spikes in temperature.I thought the memory may be the culprit and I ran MemTest86. It returned one error after a few hours of running. I have not taken the RAM out to test each module or clean the slots. The timing is set at 9-9-9-24 and I dialed down the speed to 1333 from 1600.