Like others said opencl is in the graphics, onboard or dedicated
Windows shouldn't be the issue, although with that being said if the windows 8 version drivers u have for the cpu are borked then it could be the issue
I'd have to agree with the other that your most likely missing drivers or have bad drivers for the CPU graphics or Intel HD 4600 which is what the 4770ks have
CoolerMaster HAF 932 Advanced/ Maximus VI Formula/ I7-4770K/Swiftech H320/ Corsair HX850/ G.Skill Trident X (2x8) 16gb 2400MHz/ 2x 840 EVO 120gb(Raid 0)/ WD 1TB HDD (Backup/Storage)/ EVGA GTX 1gb 560 TI/ Asus 12x bluray combo