Thanks for the help. It turns out that rebooting the machine solved the problem, oddly enough.
Just in case the information is useful to you, here are my responses to your questions/comments: 1. I also found that the installer ran fine on my desktop machine but not on the server-class machine where I needed to install cygwin. 2. No CPU activity, and total CPU used also 0, for Cygwin's setup process. Only minor activity (0% to maybe 2% CPU) for all other processes combined. 3. Nothing in the anti-virus logs. Scanned, no virus found. Problem still occurred with the anti-virus software (Symantec) turned off. 4. "do you see the UAC prompt when running Cygwin setup?" Sometimes yes, sometimes no. 5. "Are you running from an account where you would expect to be able to run with elevated privileges?" Yes 6. "Can you run the setup executable as Administrator?" Yes, and using "Run as Administrator" made no difference. 7. "I assume that there is no taskbar entry for Cygwin setup when you observe this behaviour" That is correct. Kevin S. Van Horn, Ph.D. | Principal Engineer D: 801.290.3823 | Salt Lake City Office (Mountain Time) -----Original Message----- From: David Stacey [mailto:drsta...@tiscali.co.uk] Sent: Tuesday, December 16, 2014 3:51 PM To: cygwin@cygwin.com Subject: Re: Strange problem running Cygwin installer On 16/12/2014 21:44, Kevin Van Horn wrote: > I'm having an odd problem installing Cygwin. After downloading the installer > and double-clicking on it, and clicking "Run" on the "Open File - Security > Warning" popup dialog, I get the "busy" wheel for maybe 1 or two seconds, > then it disappears and nothing else happens - no installer window, nothing. > However, Task Manager still shows the installer process, although it is not > using any CPU. > > This is on a machine running Windows 7 Professional. It happens with both > setup-x86.exe and setup-x86_64.exe. Unable to reproduce on Win 7 Ultimate with either x86 or x86_64 installers. A few things to check: Firstly, when you see the busy spinning wheel, is there any CPU activity from either Cygwin's setup or another process? Have you checked your anti-virus logs? Try scanning the installers for viruses (they should be clean!) and then running again with your anti-virus turned off. If you have UAC enabled, do you see the UAC prompt when running Cygwin setup? Are you running from an account where you would expect to be able to run with elevated privileges? Can you run the setup executable as Administrator? In a corporate environment, group policy and other rights may have changed since you last installed Cygwin. I've checked the DLL dependencies of setup-x86_64.exe compared with the previous version and there is no new DLL dependency. So if you were able to run previous versions of Cygwin setup then consider what has changed on your machine since. Anti-virus is an obvious place to start, as these signatures change frequently. I assume that there is no taskbar entry for Cygwin setup when you observe this behaviour - so the window isn't minimised, hidden behind other windows or off the screen somewhere? A few things to try there - hope one of the above helps. Dave. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
