A system image can be used to restore your machine to a defined state. If you find yourself reinstalling Windows quite often and have to reinstall the same old software each time, this can certainly take the sting out of it. Respectively, if you have terrible troubles with Windows, a system image can be used to roll back to a good state when nothing else will work for you.
A system Image is a clone of your hard drive, meaning everything will be backed up for later restoration, during which, items cannot be individually specified. You cannot backup the partition or drive that you are saving the backup image to, and you can only save the backup image on a hard drive or partition that Windows 7 is not installed on.
Unfortunately only Windows 7 Professional, Ultimate, and Enterprise editions have this feature. For any other flavour, it’s best to check out 3rd party alternatives.
This guide will walk you through creating a System Image in Windows 7.