Closing LibreOffice after opening any document causes the following error popup: DDE Server Window: soffice.bin - Application Error The instruction at "ox7c910a19" referenced memory an "0xffffffff". The memory could not be "read". Similar error was also present in the previous stable version.
I've never encountered this on Windows. Juha: can you please test with 4.3.5 or 4.4 rc2? If the problem continues, you can try this: https://wiki.documentfoundation.org/User_Profile#Resolving_corruption_in_the_user_profile And finally this to provide more information: https://wiki.documentfoundation.org/How_to_get_a_backtrace_with_WinDbg NEEDINFO, while we wait for your comments.
This was a case of corrupted user profile.