BuddyPress.org

The time taken activating the plugin shouldn’t depend on the number of users you have on your site. Most web browsers time out after >60 seconds-ish anyway so I can’t imagine it’s still doing anything productive.

Not really. I suggest you navigate to /wp-admin/ and see if it shows the plugin as active.

I literally have to go to work after this post but:

To fix your site, rename your plugins directory to anything else i.e. ‘aardvark’. Load admin again, it should load up OK. Rename ‘aardvark’ back to plugins. You’ll have to re-activate any existing plugins. Once those have been done, try activating BP site-wide again.

BP v1.0.3 tables are:

wp_bp_activity_sitewide,wp_bp_activity_user_activity,wp_bp_activity_user_activity_cached,wp_bp_friends, wp_bp_groups,wp_bp_groups_groupmeta,wp_bp_groups_members,wp_bp_groups_wire,wp_bp_messages_messages,wp_bp_messages_noticeswp_bp_messages_recipients,wp_bp_messages_threads,wp_bp_notifications,wp_bp_user_blogs,wp_bp_user_blogs_blogmeta, wp_bp_user_blogs_comments,wp_bp_user_blogs_posts,wp_bp_xprofile_data,wp_bp_xprofile_fields,wp_bp_xprofile_groups,wp_bp_xprofile_wire,

Safe to delete as you haven’t used BP yet. Also these records in wp_sitemeta:

Any “meta_key” beginning with “bp-” i.e. bp-core-db-version, bp-friends-db-version.

If you don’t remove those meta_key records, then BP will think it’s already installed and won’t install itself again.

Before you activate BP again, open up your web server error log in a window and see if you get any specific messages when you try to run.

Also, versions of WPMU and BP you are you trying to install here will help us help you.