I worked around the prolific PL2303 driver ..the driver that win10 picks is incompatible but the win7 driver (if the win10 is manually told to load the win7) driver works.
It seems win 10 compiles every possible arduino builtin module along with the sketch resulting in a 4 min compile for just blinkled .ino.
I'm not sure yet what is the issue it is doing it over and over as if the built in modules o files weren't kept.
Win10 is a marginal improvement but win7 will at some point go off maintenance and soon the free Win 10 upgrade will no longer be available.
Anyone using win 10 with esp8266 Arduino?