I'm running windows7.How to get my pc to remember my sign in information, user name, email, password etc?

[Riki]

it used to do that automatically.How to get my pc to remember my sign in information, user name, email, password etc. For years when I returned to facebook, tripadvisor a weather channel and several other sites my info entered automatically it still does on my lap top but not my desk top pc although I never signed out from those sites but had just closed the windows after visiting. I don't believe or remember changing any settings on that computer, now most of the time I have to re-enter the details. Any help would be appreciated.
Thank you, I am using IE if possible directions for IE would be appreciated.