How to Reinstall User32.dll

1. Go to the free DLL download website (see link in the Resources section) and click 'Download user32.dll.'
2. Click 'Save' in the confirmation pop-up, and then choose a location to save the file (unless you had already set up downloads to be saved at a specific location by default) and then click 'Save' to begin the download.
3. Right-click the saved 'user32.dll' file and select 'Copy.' Go to the 'Start' menu, click 'My Computer' or 'Computer,' double-click the 'C:' drive; double-click the 'Windows' folder and then the 'System32' folder. Right-click anywhere in a blank space and select 'Paste.' Click 'Yes' to overwrite the existing file (if your file is not corrupt but missing from the system, you will not be prompted.)
4. Go to the 'Start' menu, type 'run' in the 'Start Search' box and press 'Enter' on your keyboard. Type the following string in the search field and press 'Enter' to register the user32.dll:Regsvr32 'C:\Windows\System32\user32.dll'
5. Restart your computer.