I use windows7 own backup program Madman,and have succesfully used a back up on two replacement hard disks.
Yes,it should be identical,minus what you choose not to backup.Thanks Vanthus + rep . Im gonna use my external hard drive as discs will be a lot of copies. Im going to back up the os, all the programs, my documents and game saves only. My games library is like 100gb so thats too much. So if my hard drive fails i can use this backup and my pc will be identical to how it is now minus my games? Thanks