I have just posted my problem at the project-forum, but i think its the same issue (it also occours since the 4.4. !).
In my case the nbload.exe will be terminated abnormally because of a crash of the exe (access violation). If the microsoft "data access prevention" is enabled, sometimes a message of its will be displayed, because of illegal memory access of nbload…
I have debugged the nbolad with a microsoft technician for about one hour, and we both saw, the nbload itself has the bug… At my question, why the bug did'nt occour in the past, the technician told me, that there was a bug in windows that not recognize this up to now :(
I can give a debug-file (dump) for the developer. Additionaly, microsoft is willing to help further if the symbol files for nbload.exe would be available for the ms support.
see also: http://www.openntf.org/Projects/pmt.nsf/b521bae9087a360985256bed004b4ec4/69a1cf88fbcd99a4862572bc0058616d!OpenDocument