How do I enable add-ons on IE7 on a home edition XP?
Use Manage Add-Ons to check all installed add-ons. You may find that the one you need has been disabled. Firstly, Internet Explorer follows certain rules when it comes to add-ons. If the add-ons are in use at the time IE7 is installed they will automatically be enabled. It is only new add-ons that are disabled until you give them permission to run. Secondly, the add-on you need may have been disabled if it caused problems for IE. You may have an old add-on that has been updated to work with IE7. Delete the add-on for the affected site and install a new copy. The control you need may be damaged. You can not see this via Manage Add-Ons – you must go in the old way (Tools, Internet Options, Browsing History Settings, View Objects). If a Control is damaged it will say so in the Status column. If it is damaged, right click and select Delete, then download a new copy.