Right ckick menu does not open in internet Explorer

The right click menu does not appear in Internet Explorer when I use the right mouse button.

I know it has something to do wht an add on I have installed becausre using Internet explorer without add ons wors fine.

The problem is i do not know which add on it is, also is it likey to be anything else?

Thanks

Sorry Vakas, you have to do it the hardway! Have a look with hijack this and see if you have any not so nice addons (bhos)