Cubase Pro 8 freeze and wont respond when quantizing drums.

Got major problem with this! I import 18 tracks of audio with drums that I try to quantize. After slicing, I hit quantize and the CPU go up to 40-50% of use and then Cubase stop working. Any ideas? Im running win 8.1 with alll the usual stuff as powersaving off and all of the powersaving features in UEFI for the CPU off.

Got all the latest updates for Windows and latest Bios.

Hardware: MSI Z97i AC, i5 4690K, 16Gb ram, OCZ 256Gb SSD, WD Black 1Tb, Roland UA-55 Quad Capture. No graphics card, using Intels 4600 from the CPU.