How long does it take for reinstalled Windows 7 to make critical updates?

Hello,

   I reinstalled windows 7 on my Dell Inspiron N5110 (it is 4.5 years old) yesterday and I am wondering how long does it take for it to install critical updates. I have kaspersky antivirus and its protected browser cannot be used until critical system updates are installed and I would like to use it to pay bills, shop and more. How long does it take for it to install critical updates? And if it does not do it on its own, what can I do? Thank you.