Thanks guys so much. I think I'm a lucky one. I've disabled OneDrive and done nothing else and I have my computer back. I can save things - open Thunderbird etc. etc. I was tearing my hair out, I'm...

Thanks to the guys on tenforums. If you've read this post also check-out this page.
Solved Unable to create or save files in folders - Windows 10 Forums
I now see we're far from being alone. No...

I have a similar problem, Windows 10 was working fine until recently. KB3081424 was installed 2 days ago. I constantly have problems trying to save the documents I have created. Under "Folder...