An update to NIS 21.1.0.18 on or about 2/25/2014 broke Windows Home Server V1 ability to create backups most likely by somehow preventing a snapshot from being created at the beginning of the process. This has happened before going back to at least 2010. I have 5 PCs on the small Network being backed up by WHS - 3 use NIS and 2 use another product. The 3 using NIS will no longer backup and the 2 using another product work just fine as usual. This might also be affecting other automated image backup programs such as True Image.