Computer is now sundenly at a constant 50% disk usage

AssaultSugar

Distinguished
Jul 31, 2011
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18,530
Tried restarting that did nothing, And its constantly stalling with random extended freezes too. It was literally working fine hours earlier now this. Only major thing I've done to it recently is move my steam/origin folders to a different HDD. Even after that it worked fine yesterday and most of today. Defragging isnt helping since it constantly freezes at one point or another on my C drive.

System

AMD 8350 CPU
AsROCk 970 Extreme4 M/B
2 Powercolor 7950(crossfire is currently DIsabled)
16GB of RAM(getting faster better RAM anyway to replace it)
1 WD Blue 1TB(main drive with windows)
1 WD Black 4TB (I recently installed this and moved my Steam/Origin/Blizzard game folders to this drive)
OCZ fatality 750 Watt PSU
Windows 8 (updated to 8.1)


P.S. FYI there is no RAID coniguration or anything else of the sort for both drivers, I assume I dont need it since it was working fine yesterday and early today