Written and maintained by the same developer as Akeeba Backup and the Joomla! updater component of Joomla! 2.5.4 and later.
Note: a commercial edition (Admin Tools Professional) with extra security-oriented features is also available from our site for a fee. This listing is about the free version, Admin Tools Core.
Note 2: The software is free of charge, its support is not. You need a valid subscription (starting at EUR 7.79) to request support. However, its documentation, the troubleshooting wizard and searching the forum is free.
As I've written many times in the public support tickets (which can be searched and read even by non-subscribers like you) this is caused by wrong permissions on your site causing a directory to not be copied. There is a bug in Admin Tools' plugin, causing it to fail with a fatal error when that directory isn't copied. It was discovered because some other users, unlike you, took the time to file a free bug report in our Pre-Sales forum, supplying me with adequate information to replicate the issue and solve it. The bottom line is, if you have a bug report, please report it on our site. It's free. Unless you report it, don't expect to see it resolved.
Anyway, the solution to your problem is rather simple: extract the installation archive and copy the fof directory inside your site's libraries directory, so that you now have a libraries/fof directory.
Besides, we have manual uninstallation instructions in our release announcement page (https://www.akeebabackup.com/home/news/56-releases/1446-admin-tools-2-2-0.html). If you follow them, the software uninstalls cleanly and doesn't cause the problems you mention. My guess is that you removed the component but not the plugins, hence the persistence of your problem.
Finally, please note that as stated in the release announcement and our download page, Joomla! 1.7 is NOT supported.
Kudos + 5 Stars - to the development staff at Akeeba, Keep up the good work!
Great support site also....keep up the Great work....(pretty please....?)
We use Admin Tools to carry out the updating of Joomla, knowing that Akeeba Pro has a one site restore function just in case. The other features we don't use but it is always good to know that they are available if the time come when we need to use them.
Another Superb Solution by Nicholas, keep up the good work.