still, had a specific firewall setting for DNS permission in Chromium in Win7, also. maybe install the codecs, didn't migrate? rather doubt that but considering trying. but also of interest, the html5 methods that previously worked in Chromium are exactly the ones that don't work in Win10 default browser. was looking at Win 10 developmental software settings, maybe setting somehow that the user (that's me in this case) can choose trusted software. opens two windows, one like a cmd line which would open briefly then close in previous incarnation of Windows, & the browser window, then after awhile, the message that Chromium is not responding, but cpu usage continues for both windows up to about 20% each. thinking maybe something in Win 10 I haven't learned yet about the software control? tried compatibility mode for Win 7 (worked well before the Win 10 upgrade) & some others as well, slight improvement up to the point of the browse. setting not auto-detect due to local network setup, manual, no proxy.

Reinstall chrome windows 10