 It also lets users add device drivers, integrate Service Packs and other Windows Updates as well as remove drivers for obsolete or unwanted hardware and remove unwanted language and keyboard options and unwanted applications.It allows customization of the installation process, including Product Key entry, administrator's password, regional settings and creating user account names and other options normally set in Control Panel after installation, as well as numerous 'tweaks'.Various degrees of 'unattended installation' are also possible.