There are pretty much dozens of solutions for this problem but each solution might not be the only way for it, we are just missing something.
I've done this mistake more than I could remember and it's really annoying to know how easy it should.
But if this solution didn't work out, you should reformat your computer already, things like this happens because you either have "Unlicensed OS" or "Your update has been corrupted" and there are more that might cause this.
1. You must remove all external drive or flash disk
2. Turn-on your computer
3. check if the error would still appear, if yes proceed to number 4 otherwise proceed to 6
4. Turn off your computer
5. Remove the latest hard-drive you might have added to your computer (only if you have added something before this issue occur)
6. Download this to clean up! there will be a new tab so just skip after 5 seconds Download
