Windows Anytime Upgrade(An upgrade option that allows users to upgrade from one edition of Windows to another by purchasing the upgrade online. It is enabled by Software Licensing Services (SLS) technology which allows a digital lincense to determine what features are enabled or disabled allowing Microsoft to sell either additional licenses or product upgrades through digital licenses (PUP-DL). Customers may either buy full packaged product (FPP) or upgrade quickly and conveniently electronically)
