: Enables multiple users to be active on a single Windows 7 machine simultaneously, bypassing the default one-user limit.

However, with great power comes great responsibility. Use the patch only in controlled environments, keep the machine behind a firewall, and never expose a patched Windows 7 PC directly to the internet. For any serious multi-user deployment, invest in Windows Server—it’s cheaper than a data breach.

Risks and maintenance

In many older versions of Windows 7 64-bit termsrv.dll , the key bytes to find and replace are: