https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78999
--- Comment #2 from Brian Plummer <bplummer at hotmail dot com> --- You can close this bug. I uninstalled/reinstalled Cygwin a number of times from different mirror sites and finally got a good install. Here are my thoughts: 1. I disabled my AntiVirus software (AVG Free). 2. I tried a number of mirror-sites. This one worked for me: mirrors.xmission.com(http) 3. But, on all of the mirror sites I tried, the install process would periodically hang requiring me the stop and restart the process. 4. I don't think the hanging caused any problems...because when it finally finished the Hash check on all the packages passed. So, what really happened here? I just can't say. Could be that the distributions at some of the mirrors are corrupt or incomplete. Could be that my AntiVirus software was causing some kind of problem although it never complained. I only know that I got a clean install with my AntiVirus disabled. I turned it back on when the install completed and everything appeared to work as I would expect. It could be that the hangs that I described were causing some kind of problem, but I cannot say what it might be especially when the Hash check passed. That's all I've got. So, again please close this case. Thanks!!