Following the clean uninstall instructions in this page will result in losing all changes of your MetaDefender Vault installation (stored files and custom configuration).
Navigate to the installation directory (by default, C:\Program Files\OPSWAT\MetaDefender Vault). In order to perform a clean uninstall of MetaDefender Vault, including the database, please follow the steps listed below:
Open Services folder and find the file named SetCompleteUninstallFlag.reg
Double click SetCompleteUninstallFlag.reg
This will set a registry key in HKEY_LOCAL_MACHINE\SOFTWARE\OPSWAT\MetaDefender Vault that instructs the uninstaller to perform a clean uninstall.
Navigate to Control Panel > Uninstall a program
Locate and uninstall MetaDefender Vault
At this point, all files, configuration settings and database files of MetaDefender Vault will have been removed.