"Back in 2002, the research department at Microsoft started experimenting with the virtualization of 802.11 wireless adapters under the project code name VirtualWiFi. They discovered a way to make a single physical Wi-Fi adapter look like multiple adapters in Windows.
VirtualWiFi lets users simultaneously connect to multiple wireless networks with only one wireless card. They hoped this technology could be used in a variety of applications, including wireless diagnosis and troubleshooting, Wi-Fi mesh networking, virtual access points, and wireless repeating........see the link below." How to: Create Wireless Hosted Networks in Windows 7
It is safe to continue the update, it just means the driver
hasn't been verified by Microsoft yet.