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Microsoft won’t let you close OneDrive on Windows until you explain yourself
(www.theverge.com)
This is a most excellent place for technology news and articles.
And when you do get an error message, it's usually descriptive. Like a generic permission denied then a file path to the file where there was an issue or something like that.
You get an error message in Windows and it's usually something along the lines of 0xc000021a. Thank you, Microsoft. Very legible!