Try one of our easy and quick solutions to fix it now:
1. Launch Task manager
Press the [Ctrl] + [Alt] + [Del] keys on your keyboard at the same time - alternatively, right click the Taskbar. Then select Task manager.
2. Run a new Windows task
When the Task manager window opens, click the More details option to expand it, then select Run new task from the File menu.
3. Run Windows PowerShell
When the Run new task dialog box opens, type powershell, tick the box for Create this task with administrative privileges and click OK.
4. Run the System File Checker
Type sfc /scannow into the window and press the [Return] key. The scan may take some time and will end with one of three results. Windows did not find any integrity violations and Windows Resource Protection found corrupt files and repaired them mean there are now no corrupt files, but Windows Resource Protection found corrupt files but was unable to fix some (or all) of them indicates a problem.
In this latter case, type (or copy and paste) DISM /Online /Cleanup-Image /RestoreHealth into the PowerShell window and press the [Return] key. This will download files from Windows Update to replace the corrupt ones and, again, this may take some time.
OR:
Create a new user account
If reinstalling Windows apps doesn’t work, creating a new user account usually will. If you’re currently using a Microsoft account, your settings will also transfer to the new account once you upgrade it from the default local account. You’ll need to transfer your local files from one account to the other in all cases, though. Your installed software won’t be affected.
1. Launch Task manager
Open Task manager (see above) and select Run new task from its File menu.
Tick the box for Create this task with administrative privileges and type net user NewUsername NewPassword /add in the box.
You’ll need to replace NewUsername and NewPassword with the username and password you want to use — neither can contain spaces and the password is case sensitive (i.e. capital letters matter).
2. Log into the new account
Restart Windows and log into the new user account. The Start menu should now work, so you can change the new local account to a Microsoft account, and transfer your files and settings.