For those who want Cortana completely gone for all current and future users, PowerShell provides a more permanent solution. This method removes the Cortana app package at the system level and prevents it from being provisioned to new accounts. It’s more aggressive than simply uninstalling, so create a restore point or backup first in case you want to bring Cortana back later.
Caution: this removes the Cortana app package. Some deep OS integrations (search/indexing) may be affected. Create a restore point or full backup first.
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