philfry That is a bummer. I guess it would be much easier if that would be Squirrel issue, but apparently it is something else. And unfortunately, we don’t even have any meaningful logs or error messages in console to point us in the right direction. We are blind here, unfortunately.
Well, technically I can give you just zip file with all Tonfotos files to install them manually (just copy into necessary folder and create desktop shortcut, there is not much else to do), but that is not really a solution, since you will not be able to install updates this way. However, if you are not yet ready to give up, I can do that, just let me know.
What is more important, is to find a reason for that, but unfortunately I am running out of ideas what else to try, and there is no clue to what could be the reason, unfortunately.
This is definitely not something regular, as there would be many other users that faced that before, but this is the first time. May be this knowledge can help us. Is there anythign special about your system? Is it maybe part of corporate network? Is there any special security apps installed?
philfry Free space on my computer is 7.8%. 36.1 GB. (WinDirStat)
Is that all drives or C: specifically? It is importatn to have enough free space on C: