Disabling Startup Services
If Windows 8 won’t start, troubleshooting the problem usually involves trying various advanced startup options. It’s almost always a time-consuming and tedious business.
However, what if Windows 8 will start, but you encounter problems along the way? Or what if you want to try a few different configurations to see whether you can eliminate startup items or improve Windows 8’s overall performance? For these scenarios, don’t bother trying out different startup configurations by hand. Instead, take advantage of Windows 8’s System Configuration utility, which gives you a graphical frontend that offers precise control over how Windows 8 starts.
Launch the System Configuration utility (in the Start screen, type msconfig