I have discovered a solution to my problems on the Microsoft website:
Slow Green progress bar in File Explorer - possible solution - Microsoft Community
MTCSLtd started on May 6, 2016
Discussion Slow Green progress bar in File Explorer - possible solutionI've had a problem with File Explorer...
Thanks a lot topgundcp. I've also joined mainly to thank you for this solution.
I've recently been given an AMD PC with Win 8 Pro installed, Office 2007 and Sophos virus protection.
There are only 2 non-Microsoft extensions and the culprit was the Sophos components for extending windows shell...