Message # 1
Hi, I have a lot of problems with bots who spamming my forum (opening a new thread, write spam posts...)
How I can fix that?
Message # 2
boki1997, the most common solutions are for you to adjust user permissions, or adjust the captcha difficulty. I'd advise increasing the captcha difficulty to start with then looking into limiting user permissions on the forum. Keep in mind it mightn't necessarily be bots, and can be spammers in which case you will then have to adjust the user permissions of the Users group, possibly even introducing a user confirmation process from Users to Checked before they can post.
On an indefinite leave of absence.