Run installer as administrator (not your user account but hidden administrator account, even if you got admin account there still some files locked for security reasons under that account), to run application as administrator, right click exe and click “Run as administrator”. Your situation is kind of odd since usally installer as for admin rights, maybe you got some security software that interferes or director permissions are messed up on your system. You can also check system logs for hints, you can find them in computer managment (right click “Computer” and them click “Manage”)