Does the WP Security Check WordPress Plugin work in version 2.8.6 or version 2.8?
No. WordPress Security Check plugin does not work in 2.8.6 — not with proper functionality at least. If you rename your tables inside this plugin, it will fail to correctly execute and properly modify your entire databse and update a few “back burner” settings that are very necessary for Wordpdress to work.
Running this and taking all security measures will result in receiving the message: “You do not have sufficient permissions to access this page.”
Even restoring to a previous backup seems to not work as a way to fix things…
This specific Google Search should help you out with these sorts of issues