That will help narrow down the remaining possibilities.
If you encounter this error while using standard ZXP installers, follow these steps to resolve it: Zxp Installer Error 193
Your ZXPInstaller.exe file itself might be partially downloaded or damaged. If the main executable is missing critical bytes, any sub-process it tries to spawn (like unzip.exe or a node.exe helper) will return Error 193. That will help narrow down the remaining possibilities