- Download latest Nucleus Co-op 2.1.2 from the Github releases page:
- Extract the file with 7-Zip:
- When it asks you for a password write
Note: Some Nucleus Co-op hook dlls and Goldberg emulator, used by Nucleus, can sometimes be detected by windows defender and other anti-viruses and web browsers: this is 100% a false positive see here and here. You may have to allow Nucleus as an exception before extracting. Do not overwrite old Nucleus Co-op versions files with new ones, make a clean install.
Move the Nucleus Co-op folder to wherever you like, and run NucleusCoop.exe
You can place the folder wherever you like as long as you keep the following in mind:
DO NOT place it inside a folder containing files for a game you wish to play.
Avoid placing it inside a folder that has security settings applied to it, such as Program Files, Program Files (x86).
Some handlers require the Nucleus Co-op folder to be located in the same drive as the game files.
If you are still unsure where to place the folder, the root of the drive your games are installed on is usually the best option. For example C:/NucleusCo-op