Abill_uk please go read:
http://en.wikipedia.org/wiki/Advanced_Packaging_Tool

Stop comparing windows and linux they are completly different. This is why 90% of us are here i.e. linux is what we want, not stupid OS that requires 100 times to click next and on which we have little or no control. Linux in most cases don`t need whatever it is UNINSTALLTION linux have package managers (apt, yum)
If we follow your strange logic the next most important topic here will be DON`T go in the tube with n900 it will brick your device.