Upgrade Windows 8.1 to Windows 10

1. Right hand click on Get Windows 10 icon on taskbar

2. Click Go to Windows Update

3. On Upgrade to Windows 10, click Get started

4. Click Accept

5. Click Start the upgrade now

6. Upgrading Windows
    - Copying files
    - Installing features and drivers
    - Configuring settings
    - Reboot

7. On Hi there, welcome back!, enter the user password. Click Next

8. On Get going fast, click Use Express settings

9. On Customize settings, turn Off for Personalization and Location. Click Next

10. Turn On for Browser and protection and turn Off for Connectivity and error reporting. Click Next

11. Click Next on New apps for the new Windows

12. This won't take long Setting up your apps

13. Taking care of a few things Don't turn off your pc

14. Windows 10 upgrade completed successfully.

URL: http://www.techrepublic.com/article/how-to-upgrade-to-windows-10-a-step-by-step-walkthrough/