I get this error when I try to perform a windows backup. OS Windows 7 64bit.There is not enough disk space to creae the Volume Shadow copy on the storage location. Make sure that, for all volumes to be backed up, the minimum required disk space for shadow copy creation is available. this applies to both source and destination. I have two drives in my system (both simple disk). OS drive is 320gb drive with 49gb used and a 1Tb drive with two 465Gb partitions. I can write to all drives. Drive two has one 465Gb partition without data and is the target. VSC service is set to autostart and is running.I ran sfc /scannow with no integrity violations.

Usually this error come when 100 MB hidden System Reserved partition created by Windows 7 does not have enough space to store a shadow copy. Please check the freespace on this volume. Follow the following steps: 1. Start -> Computer -> Right click -> Manage2. Select Storage -> Disk management.3. Verify that you have a System Reserved partition of 100 MB size.4. If yes, right click on this volume and select Properties.5. View used and free space. Windows backup wiil require around 40 MB of free space on this partition to backup successfully. So if the free space is less than 40 GB, please follow the solution posted by me for this problem on the following thread:http://social.technet.microsoft.com/Forums/en-US/w7itproperf/thread/25deba76-464b-4a9d-9b32-a283bb6a88ceIf you run the webadmin from the command line you can exclude that 100meg partition. more links for your reading pleasure (or horror) ;)http://social.technet.microsoft.com/Forums/en/w7itprogeneral/thread/894f0901-811d-4270-955e-2962c2a4bc4dhttp://social.technet.microsoft.com/Forums/en-US/w7itprogeneral/thread/fce6950d-c06d-4dd0-a850-67022db4fe04/ MCSE, MCSA, MCDST [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]