How can I install Mingw-w64 without admin rights?
Note that I was able to install MinGW without admin rights.
I am using Windows 7.
You can download the 7z file from : https://sourceforge.net/projects/mingw-w64/files/
If you intend to install the windows version, click the x86_64-posix-seh from MinGW-W64 GCC-8.1.0, and just uncompress the 7z file.
This is up to the developer of mingw-w64.
Local admin is required to make applications available to all users, or to write information to protected areas of the system.
If the developer supports installing as non-admin users then it should be an option and the support documentation should contain this information or the developer could provide it. If the application does not yet support installing without admin rights, only the developer can change that.
if you have scoop you can try
scoop install msys2
it will install it, however it won't shim it if it detects you have another mingw enviroment installed.