All work is finished now thanks , hard graft , but worth it , as i now have one happy laddie.

I'm not sure what the problem is Tiatadi . As it's IE7 you're using you can try this.
Click start > all programs > accessories > system tools > Internet Explorer ( no add ons ).....as you're using Vista ( I'm on XP ) it may be a different way to get to system tools.
Double click on IE ( no add ons ) and a window will open saying you're now running without add ons. Use the address bar to go to one of the sites where you're having the problem and try to log in.
Let us know if you can do so. Don't worry about the IE add on mode , once you close it and log back on as normal IE will be as it was before.