A "pre-activated" download usually refers to a pirated version of the software where a third party has modified the original code to bypass Microsoft's activation mechanisms. While this may seem like a convenient way to avoid subscription costs, these versions are not distributed by official sources and carry hidden costs to your privacy. Critical Risks to Consider Office 2013 End of Support - Microsoft 365
Even when cracked: Activation emulators often tie to a specific machine ID or KMS host. Moving the crack to another PC usually fails or requires re-cracking, increasing exposure.
Office 2013 itself is outdated (extended support ended April 11, 2023). For security, consider: