Randomly freezes windows pro 8.1

[Pockymon]

System:
OS.... windows pro 8.1
MB.... asus crosshair v formula-z
CPU...AMD FX-9590 Vishera 8-Core 4.7GHz Socket AM3+
GPU.... 2 Nvidia geforce gtx 980
TOWER.... cooler master storm trooper
MR.... 32 GB CORSAIR Vengeance Pro 16GB (2 x 8GB) 240-Pin
NZXT cpu water cooling system
SSD.... Samsung 840 EVO 250GB SATA III
Power Supply EVGA supernova 1300 G2

Any idea what this problem might be?

 

[Sammyjo20]

System:
OS.... windows pro 8.1
MB.... asus crosshair v formula-z
CPU...AMD FX-9590 Vishera 8-Core 4.7GHz Socket AM3+
GPU.... 2 Nvidia geforce gtx 980
TOWER.... cooler master storm trooper
MR.... 32 GB CORSAIR Vengeance Pro 16GB (2 x 8GB) 240-Pin
NZXT cpu water cooling system
SSD.... Samsung 840 EVO 250GB SATA III
Power Supply EVGA supernova 1300 G2

Any idea what this problem might be?

Have you ran a CCleaner scan and registry cleaner?

https://www.piriform.com/ccleaner/download

I would also scan for viruses / malware:

http://www.malwarebytes.org/

- Sam