One thing that really annoys me is a bunch of items in the Windows Start Menu that I don't use or don't work. I tend to throw such items in a "General" folder and forget about them.
However, some systemapps have entries in the start menu that seem to be hardwired -
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Cortana
Microsoft...
configuration
cortana
customization
desktop
entry management
folders
microsoft edge
miracast
navigation
settings
start menu
systemitems
task management
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user experience
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windows 10
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