Once a file is quarantined you have two choices of action that you can take.
1) Safelist the file if you believe it to be safe and deem it necessary to perform everyday actions on the device. Here are the instructions to safelist the file:
2) Let the file stay quarantined.
If you choose to allow the file to stay quarantined it will be deleted from the quarantine folder on a monthly basis to ensure it does not take up space on the machine.