I have a problem to load the dstroke with the Miktex 2.9 package manager.
I refreshed FNDB, updated formats in the settings and synchronized the package manager. I did this multiple times and I also tried other mirrors.
MiKTeX Problem Report
Message: Unknown archive file size.
Data: package="dstroke"
Source: libraries\miktex\packagemanager\internal.h
Line: 497
MiKTeX: 2.9
OS: Windows 10 Pro, 64-bit, build 10586
Invokers: non-existing/explorer
SystemAdmin: no
PowerUser: no
... file paths ...
This problem was also reported in the EDIT part of the question: Miktex 2.9 problem installing dsfont.sty
I put this a as new question, as the latter was mainly a synchonization problem. My problem was solved there 'manually', which I cannot reproduce (file names, url?). Although, I couldn't comment there as a new user.
\documentclass{...}and ending with\end{document}. – Seamus Aug 22 '16 at 10:59