1. what is it and how do i disable
2. it has some passwords for facebook and such, but it doesnt say which is which. i just know.
1. UAC is that User Account Control annoying pop up that comes up asking this stuff:
*clicks on steam*
Do you want to run Steam?
*yes*
Are you sure?
*yes*
Enter your password.
*types password*
Are you sure this is your password?
*yes...*
Are you sure you want to do this?
*yes!*
Are you sure?
*YES!*
Sorry, but you need administrator privileges to submit your password. Try again later.
*ok*
Are you sure you want to press this to exit this box?
*yes*
Enter your password.
*enters password*
Are you sure?
forget ME
and so on and so on.
2. Anyone with the slightest knowledge would be able to try those on all common sites. Hell, if they got on your computer, they could even just see your visited sites and try accordingly.