I read this thread and It sound almost as bad as an amd/intel thread.
I have 9 machines in my home an office from Q8300 Dual core to I7-4790K gaming boxes, all upgraded from Windows 7 to Windows 10, and none have any issues.
Of course Cortana stripped from win10 causes issues, Cortana and search and indexing are all one thing now. so basically you removed all three.
if you don't want Cortana to run and bother you, or fear telemetry etc, just run an application design to disable functions and not "cut out what you don't like" like a butcher instead of being a surgeon... run O&O Shut Up 10 and adjust windows to fix your needs without destroying the O/S
deleting components of an OS is like removing a hose in your car engine without checking if it may be used for cooling it first.. yeah your messing with it. duh.
As for the start menu, just download and install Classic Shell and return your Windows 7 or 8 menus the way they were and quit whining about it. this is not a new fact .. geez