This method of reinstallation is faster but requires 20GB free disk space. If you don't have that much disk space or would like to do a clean reinstallation then use the Daedalus reinstallation - normal method. This method of reinstalling is faster but it creates a second copy of the blockchain on your machine so it takes up more space.
Make sure you have your 12-word Daedalus wallet recovery phrase before you uninstall. If you do not have your 12-word Daedalus wallet recovery phrase you will lose all your ada.
You can check your 12-word Daedalus wallet recovery phrase to see if it is valid before you reinstall.
Daedalus wallet reinstallation - Quick method
Follow the instructions in Daedalus reinstallation - normal method but when it comes to deleting the Daedalus directory during removal fo Daedalus, simply rename the folder instead. This will keep a copy of it on your drive but save time since it can take a while to delete the blockchain.