IE Add-ons disabled

[#1]

Recently reinstalled windows and updated via the Microsoft website including installing IE7.
At the top I have Add-ons disabled. To enable them I have gone to Tools, manage Add-ons only to find the option greyed out!
Any ideas on how I get get this switched on to enable add ons?

[#2]

What you have done should work. Are you running the right IE? There is an option in the start menu to run it with no add ons

[#3]

Problem with Tools , Manage Add ons, is that I can't select it. Also when I open IE it opens with a page title "Internet Explorer is currently running without add-ons". Further down the page it states to close IE and reopen again. But of course no different 
On the Start Menu IE appears with No add ons in brackets!
Version I am running is 7.0.5730.13

[#4]

Have a look here

[#5]

Its as I said you are loading IE without add ons this is for debugging etc. You need to load it with the full options click on IE normally in "C:\Program Files\Internet Explorer\iexplore.exe" it should run then in full mode.
You are actually running iexplore.exe -extoff
It should be on the menu anyway or try quick launch bar