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#11
Whilst it's 2019, I'm still using Windows 7 and experienced this exact problem.
The solution for me was to remove the AMD Hydravision application that is installed by default as part of the Catalyst Drivers package! Removing this fixed the issue whereby about a space 100px to the left of the minimise button does not recognise clicks or drags! Very annoying!
2012 HP Laptop still going strong with Windows 7, although I recently re-installed the O/S and drivers so this problem re-appeared.