Did you have any difficulties installing a 'mod', a 'texture' pack or any other element of Minecraft that, having not installed correctly, created problems with the video game? If so, this tutorial can help you solve the problem. Note: the procedure described in this guide is strictly reserved for a Windows system, it cannot be applied to Mac or Linux systems (although the procedure for these systems should be very similar).
Steps
Step 1. Access the 'Start' menu, then perform a search using the 'Run' keyword
Select the relevant icon that appears in the results list.
Step 2. In the 'Open' field of the 'Run' window, type the command '% appdata%' (without quotes), then press the 'Enter' key
Step 3. Browse the contents of the '% appdata%' folder for the '.minecraft' file
When you have identified it, proceed to delete it by selecting it with the right mouse button and choosing the 'Delete' option from the context menu that appeared (if you wish you can simply rename the file in this way '.minecraft_old').
Step 4. After deleting the old '.minecraft' folder, close the '% appdata%' folder window, then start Minecraft and log in using your login credentials
Step 5. Minecraft will be updated with the latest version available
Step 6. Your Minecraft installation is now 'clean' and ready to use
Good fun!