WUBI restore using Windows system repair disc?

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http://askubuntu.com – Can I use a Windows 7 system restore disc and system image disc (of Windows drive C) to restore WUBI if my computer crashes? I use Deja Dup for backups, and have a CD of the WUBI .iso installation file? I don't want to run Ubuntu in a separate partition because I find it convenient to run Ubuntu as a WUBI because I can use Windows drivers etc. Thanks for any advice. I have looked for an answer, but can't find one that answers this particular question. (HowTos)