It’s handy to know, so here they are:

To restore Pi-hole to the default blocking lists, just delete all the lists but these six five lists.

Note: There used to be a sixth list, which is now dead so you can safely delete it:

Note: There used to be a seventh list, which has been discontinued, so you can safely delete it:

If you visit that page in your web browser, you will simply get the message:

# ZeuS Tracker has been discontinued on Jul 8th, 2019

So, go right ahead and remove it from the lists to clean up your Pi-hole!

To delete lists, simply go to the web interface and sign in as admin, then Settings > Blocklists and use the trash icon next to the lists you want to delete and then hit “Save and Update”.

Alternatively, sign in to your Pi-hole using SSH and edit /etc/pihole/adlists.list with nano or your favourite editor, and then update the lists with pihole -g.

That’s it!