Has any one had a situation where the O/S and miner both freeze after an hour of operating?

Set up:
Windows 10 1079 Build 16299.64
AsRock H110 Mobo
5x Vega 64 no mod
2x Rx 580 founders edition
16gb DDR4 ram
100gb virtual memory
M.2 SSD 250gb
I3-7350k
Amd 17.11.2

everything runs good but things just seem to freeze after a while...

Please help...