Luckily, there's a solution to this that may seem a little complicated, but it's not at all. Our first thing to do in this case is to restart the machine in safe mode so that we will be able to log in. To access Safe Mode, press F8 when Windows starts, which will bring up the Windows Startup menu, where you can choose to start Windows in Safe Mode. I will illustrate my description with pictures. I have Windows 10, but it will look almost like it does on Windows 7, just a little different in design. So after logging in safe mode, click the start menu and type regedit in the search box, and then press ENTER. This will bring up the settings editor panel, where you will need to browse to the next path from the list on the left. (As if in a file manager) HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ ProfileList [img alt_text = 'settings manager' description = 'HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows NT \ CurrentVersion \ ProfileList'] https:///wp -content / uploads / 2017/01 / beallitaskezelo-2.jpg [/ img] Now I will describe what can be seen in the figure above. Delete the .bak suffix from the end of the folder with the .bak extension, add the .bak suffix to the end of the other folder that didn't exist before. Curiosity: Since 2 folders with the same name cannot be used, deleting the .bak extension will cause an error, as this would create 2 identical folders. Solution: First, say a .ba suffix behind the endless folder. Then delete the .bak extension from the other folder, and you can finally overwrite the .ba extension to .bak. from the registry manager and restart the machine properly. If you did everything right, you will be able to log in to your account with your previous password.