When you remove write protection, components are no longer protected from unauthorized changes.
Run this command at the command prompt.
sadmin write-protect [ -r ] pathname1 ... pathnameNWhen you specify the file path, write protection applied to all files in the specified path is removed.
For example:
sadmin write-protect -r Listener.ora
Remove write protection from specific registry keys.
sadmin write-protect-reg [ -r ] registrykeyname1 ... registrykeynameNFor example:
sadmin write-protect–reg -r HKEY_LOCAL_MACHINE\SOFTWARE
Flush write protection from all components.
sadmin write-protect –fFlush write protection from all registry keys.
sadmin write-protect-reg –f