Windows 7 system image creation in less than 10 minutes?

[Archdeacon]

Usually when I do a system image backup (standard procedure from Start menu, ie type BACKUP) on my 140gb drive it takes around 2 hours, but today the operation took less than 10 minutes, although it said completed successfully. What is going on here as there are no apparent errors?

 

[Brds7t7]

Windows 7 backup uses incremental backups when creating a system image with file/folder backups. So it could be that it's only backed up the changes since the last full backup/incremental.
Did you check to make sure it included all the drives/folders for backup?
You can mount the system image to check this:

How To Extract Individual Files From a Windows 7 System Image Backup

 

[Archdeacon]

Thank you very much, Sir; I had completely forgotten that it was incremental. I did include both C and D drives.