If you are trying to play Minecraft: Java Edition in the Minecraft launcher and are met with the launcher.dll: LoadErrorNotPresent error, it means that a file is missing. The best way to fix this is by uninstalling and reinstalling the Minecraft Launcher.
Uninstalling the Minecraft Launcher
- Type Add or Remove Programs into the Windows search bar and open the Settings window.
- Find Minecraft Launcher.
- Click the … and select Uninstall.
- After it has been removed, you can reinstall the Minecraft Launcher through: