Yes, referring to GUI. Waiting over 30 seconds for it to load (counting the seconds) and desktop locked up until it loaded. There were only three items in Start: Nod32, acrotray and my DNS updater, I disabled acrotray and DNS but still had problem.
Then noticed a program 'trying' to load called 'nVIDIA GeForce Experience' - uninstalled it and problem went away.
Thanks for your help with this!