Update!!!
FIXED!!!! Yes I have actually fixed it after 4 months, guess what it was????
The bloody firewall!!!! I have been running for 3 days no locks at all!! Such a stupid thing !!!
AArrgghhh
Only problem is now I am stuck with dodgey windows firewall!! Pc tools firewall and zone alarm cause this problem on newish motherboards dont ask how or why I dont know. I have done a lot of searching and no one really knows so software/hardware issue I suppose!! Linked with USB instability!!!
Problem is now I have no firewall only windows, which I have as much trust in as a chocolate teapot!!!
By the way Gigabyte got back to me twice and in the end wanted me to RMA!! So happy am sorted I think, I am still at stock on Bios 15t so will see!