Common to all of the laptops were sudden, extended and repeated hangs. There was nothing showing up on Anti Virus, Anti Spyware, Rootkit or hardware tests. They had all developed this issue since the upgrade to Windows 10.
I tried updating all the drivers, checking for OS updates and also running the Tweaking application. The Event View was littered with all kinds of events, errors and warnings, but nothing specific enough to give a clear picture of what the issue was exactly.
The only answer I could find to this irritating issue is a Reset.
|From the Settings Menu|
A full reinstall of the operating system but it keeps your documents, photos & files, although making sure you have some kind of backup is always a good precaution, but it does get rid of applications and those will need to be reinstalled.
Using Reset This PC with the Keep My Files option does not keep any desktop applications that were installed. For example, MS Office, Chrome and iTunes would need to be reinstalled, as will your security software and printer. The reasoning behind this is that it could be one of these applications that caused the issue in the first place. However, once the reset is finished you will find an icon on your desktop that lists all the applications that were not reinstalled, so that you can make the decision whether you need to reinstall them.
There are many tutorials "how to use Reset for Windows 10". So there isn't one here! highlight the words in quotes, copy and paste into your web browser!