Can't left click until file explorer is restarted

[Derek_119]

System:Windows 10, 19045Dell 5577, Crucial SSD (checked good), 16 GB ram, i5-7300HQBehavior:The left click on any/all items does not work except in task manager. The mouse can be moved with the trackpad or a dedicated mouse, but left clicking is not possible, including on the task bar + start menu. A right click will bring up the relevant menu from whatever window is open. This has been a persistent problem with windows through several updates. Left click will work in task manager (via ctrl-alt-del, then using the keyboard to open task manager) on the second left click. No error message is giv

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