Today installed win10 1903 (10.0.18362 temporary lack Build 18362)
When installation is selected Professional Workstation version] [win10 but can not be activated, (because it was from, only numbers associated with accounts on win7 upgrade win10's license)
can only be activated [Pro], it can not be activated [Workstation]
solution:
Set in [] [] [activation] Click resolution of the question, after analysis, you can select [begin] recovery [win10 Pro], after the restart, directly activated.