You are trying to use Vista's own Backup & Restore Center tool to backup files on your system. After a few minutes of "preparing", the backup fails with the following error:
"File backup failed. The error is: The system cannot find the file specified. (0x80070002)."
Solution
There is a bug in the backup tool where it is trying to backup the files for a profile that is no longer (or never was actually) present on your machine. To remove this "ghost profile", follow these steps:
- Run "regedit.exe" from the Start Menu.
- Browse to the following registry key: HKEY_LOCAL_MACHINE/Software//Microsoft/Windows NT/CurrentVersion/ProfileList
- Look at each of the subkeys in this "ProfileList" key & find the one that has no "ImagePath" property.
- When you find the profile with no ImagePath, simply right-click on it & delete it.
- Close Registry Editor.
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