Re: Yeah, even if they have one it may not work where the machine is.
DriveSnapshot works booted from an Windows install DVD/USB Stick. Just go to "recovery" and then the cmd prompt. Which lets you start drivesnapshot, and then you go on restore.
I must admit, it sounds great.
I get a little wary of web pages that start with
Create Disk Image Backups, While Running Windows
The Backup process will back up all your data into a single file, containing all data, including system data and registry, for total security, should your computer ever crash.
There is no restart (to DOS) necessary.
(My bold and italics)
And follow later with
Complete Restore of a disk in case of Disaster
If a disk is restored to its original state, it will be exactly the same as at the time of Backup - byte for byte.
Restoring a system partition will require DOS; other drives can be restored using Windows
It's a little misleadingly worded. Not everyone will appreciate the subtle distinction between system data and system partition.
It almost certainly uses the Wikipedia:Shadow Copy service, which as Wikipedia points out, is not guaranteed to give you a consistent backup, although good attempts by using the 'writers' are made. I hope your applications are compliant.
[Note: assuring consistency of a snapshot when multiple files / databases are open which depend on updates being consistent across the set of files/databases require cooperation between the snapshot software and the application (or applications). Unless you know your applications do this cooperation, running a snapshot can be like playing Russian roulette with your data.]