When installing Python on Windows Server, you may encounter error 0x80070659 with the message "This installation is forbidden based on system policy." This is a standard security restriction that blocks the execution of files downloaded from the internet. The issue can be resolved in under a minute without modifying the registry or Group Policies. Simply run the installer as an administrator.
How to quickly start the installation:
First, unblock the downloaded file: File Properties → General tab → check the Unblock box.
Then, initiate the installation by selecting Run as administrator from the context menu.