hi, a friend uninstalled windows xp from my pc and installed a version of windows 7.now my pc wont recognise my printer,scanner,or phone .i only gave it to him to do a general clean up of the pc,as i was happy with windows xp should i just get windows 7 uninstalled and put xp back on?.i have the xp installation disk.if i put the installation disk into pc the installation wizard offers an option to save data from "old" computer.will i be able to use this option to save my photos,favorites etc?