You need to do this before installing the game:
Set your local system and region to Japanese, sometimes some games need your computer time set to japanese too
Turn of your antivirus in case the game has some cracks
Turn off your UAC

How to install the game?
1. Extract the files , password usually zantedeschia or craneanime.com or craneanime
2. IF the files is image file (ISO,mdf,mds) You must use image tools mount like Daemon Tools Lite Alcohol, WinCDEmu
3. Then Install the game and use the crack if needed.

Some Tools:
Universal Crack for almost all siglus engine game : https://azure.kdays.cn/onekeyunlock/
Locale Emulator (Changing Locale without changing it from your system, sometimes it doesn’t work for some games): https://xupefei.github.io/Locale-Emulator/
Textractor (hook text from the game so you can use translation tools): https://github.com/Artikash/Textractor