Cygwin windows won't close

Sat Oct 6 17:31:00 GMT 2018

Hi
I can't close Cygwin windows. When I click on the X at the upper-right hand corner of the window, it just hangs. When I click on the X again, the title bar displays, "(Not Responding)". Prior to attempting to close the window, everything works fine. I did use the 64-bit version for installation - setup-x86_64.exe.
Thanks.
$ uname -r
2.11.1(0.329/5/3)
From DxDiag:
------------------
System Information
------------------
 Time of this report: 10/6/2018, 10:22:22
 Machine name: L-SJN-21019624
 Machine Id: {DA379F66-791A-47A8-BD75-C9BCEDD0EA28}
 Operating System: Windows 10 Enterprise 64-bit (10.0, Build 14393) (14393.rs1_release.180827-1809)
 Language: English (Regional Setting: English)
 System Manufacturer: Dell Inc.
 System Model: Latitude 7490
 BIOS: 1.4.1
 Processor: Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz (8 CPUs), ~2.1GHz
 Memory: 16384MB RAM
 Available OS Memory: 16240MB RAM
 Page File: 13251MB used, 5421MB available
 Windows Dir: C:\WINDOWS
 DirectX Version: DirectX 12
 DX Setup Parameters: Not found
 User DPI Setting: Using System DPI
 System DPI Setting: 96 DPI (100 percent)
 DWM DPI Scaling: Disabled
 Miracast: Available, with HDCP
Microsoft Graphics Hybrid: Not Supported
 DxDiag Version: 10.00.14393.2457 64bit Unicode
Lyle Ziegelmiller
Consumer Onboarding Vertical
Mobile: 650-678-7868
Cube: 17.3.H212
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