Features allegedly said include:
- Network Access Protection (NAP), an enterprise policy enforcement technology that inspects client PCs before they access a corporate network, then updates the machines if necessary or blocks them if they don't meet specified security criteria.
- Kernel module updates containing several encryption algorithms that can be accessed by third-party developers for the in kernel-mode drivers and services.
- A new Windows activation model that doesn't require users to enter a product key.
- New “Black Hole Router” detection - Windows XP SP3 can detect and protect against rogue routers that are discarding data.