Reset the counter for Screenshots numbering

First, press the Windows key plus 'R' and then type in Regedit to open Registry Editor. Navigate to HKCU\Software\Microsoft\Windows\Current Version\Explorer.

At Explorer, in the right-hand column, look for and right-click on ScreenshotIndex, and then click on Modify. In the little window that appears, type in the new number 01, and click OK. 

The new counter total for ScreenshotIndex changes to 01. Exit Regedit. And if you don't use that key combination again for anything else, then the next time you press Windows key plus R, it will take you right back to this location in the Registry, and you won't have to hunt for it. And before you do all this, you can
delete those other screenshots in the folder to start over.