Reports of Windows 10 Search Stopped Working

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Users are reporting a bug in Windows 10 Search bar which stopped working, and just brings up a blank box.

It's working for me, but then, if others are reporting it there must be some kind of conflict on their syste.

[bbc.co.uk...]

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Just for completeness, Microsoft says it's now fixed, a few hours after the reports came in, suggesting that some users may need to reboot their machines.