So After spending months and i mean MONTHS with a problem I couldn't trace (Thought it was some incompatibility between NZXT Cam and Corsair Link) I have finally found the issue that causes Windows 10 to randomly freeze up or slow right down to almost unresponsive and the only way to sort it is to hard reboot. It turns out it only happens when SLI is switched on and there is something using the gpu's. I actually tried to see what would happen if i switched off SLI whilst it was very slow and it crashed the display all together. I believe this issue is something in the drivers themselves. So ill be posting this over at the nvidia site unless @ManualG comes on here and can back to me on this. So therefore if im just browsing the net or watching something I can switch it off but if im gaming there is a fairly high chance it will suddenly drop the fps and i know exactly whats happened. Its been like this since forever on Windows 10. Windows 7 however is fine.