Which updates? Which browser are you using?
It's tough to guess which items you're referring to..
If you're referring to usernames and passwords at websites that require logins on Internet Explorer, then frequently such updates blank out the various cookies that "remember" such passwords. Or maybe YOU are cleaning the cookies which also causes the same thing.. Try using a secondary browser which isn't affected so readily by such updates.. Maybe Firefox, Opera, etc.
Hope this helps.
why is it everytime I get new updates my password and usernames that were saved are gone??