UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36

Steps to reproduce the problem:
1. Launch Chrome.
2. Close Chrome
3. Can not open chrome

What is the expected behavior?
for Chrome to launch

What went wrong?
Basically if you close and try to reopen chrome nothing appears to happen, no GUI. Chrome is listed as a background process in the task manager and the chrome.exe is showing as using resourced on the details tab of windows task manager. This happens on multiple workstations on different versions of windows from Windows 7 onward. 

Did this work before? Yes prior to latest update

Chrome version: 54.0.2840.59  Channel: stable
OS Version: 10.0
Flash Version: Shockwave Flash 23.0 r0