What are specs of the PC?
have you tested hdd using hdtune? (get free version). Look at the health tab for any warnings.
Does it do it in safe mode?
go to settings/update & security/recovery
under advanced startup, choose restart now
this loads a blue menu on restart
choose start up options
hit the restart button
choose a safe mode (it doesn't matter which) by using number associated with it.
Pc will restart and load safe mode