How do I boot into Windows operating system?

I – Hold the Shift key and restart

This is the easiest way to access Windows 10 boot options. All you need to do is hold down the Shift key on your keyboard and restart the PC. Open up the Start menu and click on “Power” button to open power options. Now press and hold the Shift key and click on “Restart”.

How do I fix loading operating system?

Fix #2: Use Startup Repair

1. Insert your Windows Vista install disc.
2. Restart your computer and boot from the CD.
3. Press any key when you see “Press any key to boot from CD or DVD”
4. Click Repair your computer after selecting your language, time and keyboard method.
5. Select the drive of your Windows installation and click Next.