I was surfing, and put in a password, i accidentally
checked the box saying i didnt want that feature to come
up again. is there a way to undo that and get that
feature back?

You can configure AutoComplete to save and suggest only the information you
want. You can choose whether to use AutoComplete for Web addresses, forms,
and passwords, or not use it all. You can also clear the history for any of
these.

In Internet Explorer, on the Tools menu, click Internet Options.
Click the Content tab.
Under Personal information, click AutoComplete.
Select the check boxes for the AutoComplete options you want to use.