We recently ran some polls on Twitter to about backup strategies. A worrying statistic was that 64% of respondents have never tested their backups!
There are a number of ways you can test your backups and a combination of two or three is advisable.
Verify a backup
Test Rescue Media
Mount an image
Test Restore an image
System images of, for example, the C drive, contain operating system files so it is not possible to restore files in real time because they will be in use by the operating system. To resolve this Macrium Reflect boots Windows PE. It then restores the file system before rebooting again and loading the restored Windows OS. Although this sounds complex, it really is very simple to perform. For restoring a system image see Restoring a system image