[@robin-w Moderator 12 years, 3 months ago]

ok, given that I presume you want to get rid of all topics and replies in the forum, and then the forum itself.

First take a backup – after you have permanently deleted, there is no way back !

then delete the topics and replies for that forum (or they’ll still appear in searches)

Dashboard>topics

at the top click screen options, and select say 500 so that you can delete 500 topics at a time !

The filter for the forum you want to delete and choose bulk delete.

Repeat for replies

Then

Dashboard>forums and select your forum and edit

under ‘publish’ on the right hand side you’ll see ‘move to trash’

click this and move to trash

you may then want to permanently delete the topics, replies and forum, maybe after backing up first !