My trusty Linux laptop finally stopped working, and the standby is now too slow for any useful work.
The replacement laptop comes with Windows 10 Home. With Visual Studio 2019 community edition, Dolphin Smalltalk built cleanly. With Cygwin, the OpenSmalltalk VM for Squeak too built cleanly. This VM runs both Squeak and Cuis. The Pharo edition of OpenSmalltalk VM failed to build; ditto Pharo's fork of the VM.
Next, to set up dual boot.