How to manually remove admintools from joomla

Just delete or rename this files :)

plugins/system/admintools.php (Joomla! 1.5 only)

plugins/system/admintools

plugins/system/atoolsjupdatecheck.php (Joomla! 1.5 only)

plugins/system/atoolsjupdatecheck (Joomla! 1.7 only)

plugins/system/atoolsupdatecheck.php (Joomla! 1.5 only)

plugins/system/atoolsupdatecheck (Joomla! 1.7 only)

administrator/modules/mod_atjupgrade

components/com_admintools

administrator/components/com_admintools

libraries/fof