The easiest and fastest way:
Backup a drive.
Map the drive as virtual drive.
Use WINDIFF or similar file compare tools to compare the two drives; they should be identical.
You will see differences, because WINDIFF will not be able to open the PAGEFILE or registry files on the original drive; but that's not SNAPSHOT's fault.
For these files you have to believe us (of course we tested this, using slightly more complicated setup's)
It's probably a good idea to save your open files before starting Snapshot Backup.
Otherwise you would eventually get outdated data on your disk.
After starting the Backup, you may continue to work normally, the image will reflect the data at start time.
I won't make you happy, but Snapshot won't care.
The created image will not contain any sign of a virus, ready to be restored.
It is not possible to run programs, that access the disk directly, while Snapshot is running.
SnapShot relies on the operating system to support a drive.
All file systems known to Windows(FAT16, FAT32, NTFS) are supported; plus some LINUX file systems (EXT2,EXT3,Reiser).
Other file system are stored completely, ignoring any free space information.
Snapshot works sector oriented.
Snapshot will backup all sectors relevant for the file system, and restores them exactly the same way.
Snapshot never interprets these data on its own, the interpretation of these data is up to the file system.
Snapshot only provides the necessary data.
The same is true for the Image Viewer.