It changes to the grey screen that shows the progress and says "accepting send" (never gets beyond that) and within a minute or so the dialogue in the channel freezes and the frame on the right side that shows everyone's name goes completely empty and then the bell rings "disconnected" I can immediately reconnect but if I try it again it's the same thing. Nothing else on my system is freezing. I have not tried leaving it alone after it happens. Only zip files are affected but I haven't attempted to receive all of the other types of files. I know .txt files work fine.