BitLocker drive encryption helps protect corporate data on mobile PCs that include a TPM chip. BitLocker now encrypts hard drives more quickly, helping to keep your data safe without interrupting your productivity. BitLocker now supports encrypted drives, too.
SmartScreen services help protect you from malicious sites and software on the internet. It checks the reputation of any new app or website, helping to keep you safe no matter what browser you’re using. That helps prevent malware and other viruses from infiltrating your PC, or your corporate network.
Windows Media Center lets you turn your PC into a home entertainment system that can play and record high-definition TV (if you have additional tuner hardware), DVDs and CDs. It's also a software DVR that can play photo slideshows and internet TV content.
If your PC is running Windows 8, you can get Windows 8 Pro Pack and enjoy all the features of Windows 8 Pro. If you purchase a new PC with Windows 8 preinstalled and you later upgrade that PC with Windows 8 Pro Pack, you will no longer be able to install apps that are provided exclusively from your PC manufacturer through the Windows Store.