I have just reset my Lenovo computer 450, 2 Tb , i7, 12 ram to factory

settings, all went well then I changed my progran to Firefox, worked

great, problem was, out of curiosity went back to IE 8, now it will not

respond it will open programs that seem to be installed with the computer,

but not others, i.e google, mail, yahoo.
What the heck?