Make sure the installer is not on a OneDrive drive or a OneDrive-mapped folder. Recent versions of Windows are sneaky and replace your local folders with OneDrive folders.

Thanks but I checked the folder is not mapped to OneDrive, also the bot agent was installed and run successfully just a couple of days ago until I uninstalled it and now try to install it again, not sure if I did something wrong during the uninstallation.

There are no options during the uninstall process, so it’s unlikely anything bad happened during the uninstall process.

Try copying the installer to a thumb drive and installing it from there. If that fails in the same way, try a different browser to download the bot agent (to avoid caching a corrupt copy) and try again.

Unfortunately there is one option during the uninstall process which is the cancel button, I clicked cancel during the uninstall process which left something undone in the registry, luckily our IT guru helped clear the files in the registry and I can install the bot agent again. Case closed. Thanks for the suggestion anyway.