I have tired Windows 7 snap-in backup once and never use it again because everytime i tired to backup my system drive. it would pop up an notice, saying there is an error. What kind of error? I don't know. It just won't let me do this. So I switched to free backup tool: Easus todo backup on download.cnet sucussfully done and i use it to do my daily jobs. at download cnet holds lots of backup freebies.