Not sure about what video you may have watch and tried fixing the initial problem, but.....
The current screen image you attached would indicate a problem with the Windows Registry.
Good place to try a System Restore
Boot from the installation media after the initial page you will see a Repair your computer link,
click that and use the Advanced Troubleshooting Options and use that to perform a System Restore to a point prior to your attempted fix and the initial problem first occurring