You cannot start Windows normally. Windows hangs when the GUI should be presented, or after the GUI starts but devices do not function properly.
Using a command-line interface
Safe Mode lets you "get under the hood" of Windows without the clutter of excess services, drivers, and resident programs, including some viruses and spyware. It gives you raw, brute force control over troublesome configuration items stemming from recently installed or corrupt hardware or software. In Safe Mode you have full access to everything Device Manager knows about the system hardware so you can remove devices, update or roll back device drivers, and even reset the configuration data of legacy devices to match their true hardware settings. You also have access to the Registry Editor and services console to remove or disable troublesome services and programs.
Safe Mode does not allow you to use Add/Remove Programs because the Windows installer service is not running and some uninstall processes simply will not run in Safe Mode.
By coincidence, just running in Safe Mode can allow Windows' Device Manager to reset device configurations without troublesome drivers in the way, allowing Windows to restart normally without your having to touch a thing. With all these subtle yet powerful benefits Safe Mode can be your best friend in times of Windows' seemingly unreasonable confusion about what and how it should run.