Windows updates are very important to keep our computers running correctly and secure.  If we don't allow them to finish installing completely, then they can cause more problems then they fix.  We have seen them stop printers, keyboards, and mice from working.  If you see the restart screen, then when you get ready to leave at the end of the day tell you computer to restart.  That way you are not waiting for it.  The other thing I try to tell people is to get in the habit of turning your computer off when you leave on Friday, and that will allow any updates to finish installing.