DOS Games made for DOS require an emulator to run on Windows. Use DOSBox or a frontend like D-Fend Reloaded and read this guide to play DOS games on your Windows PC.
WIN Games made for older versions of Windows may not run on modern systems. Read this guide to learn how to run the game properly.
These are some of the abandoned games similar to Varicella in some way.
Questprobe Featuring Spider-Man
Zork Zero: The Revenge of Megaboz
Legend of the Sword
Adventure in Serenia