After my brief trip to visit family I was trying to sync my CentOS 7 laptop back to my Windows 7 desktop and kept having the file transfer fail. I noticed that it seemed to work briefly if I rebooted the Windows 7 machine...
Looked in the error logs and found the error: "The server was unable to allocate from the system nonpaged pool because the server reached the configured limit for nonpaged pool allocations.", If I restarted the "Server" service, it would work briefly and die again. It turns out I needed to
make the registry changes mentioned here and then restart the Server service for it to work properly. Yay Microsoft!