Answer: Disabling one of the installed injected wallets can be done by going into the settings of the wallet and disabling the wallet that you no longer want to use. This will prevent the wallet from being used and will ensure that all of your funds are kept safe and secure. Additionally, it is important to remember to back up any information associated with the wallet, such as private keys and passwords, before disabling it. This will ensure that you can still access your funds if you ever need to.