Testing 2 PC's with 10 on a network of 24 users. Both machines were running 7 and updated prior to the upgrade. Both have reset network connections to some strange IPV6 setting including ## signs, wiping out the IPV4 settings. Now they wont allow IPV4 settings at all. Ive connected 24 PC's to the network, but these 2 refuse to recognize the network or for that matter even connect to the internet. First they said they were activated, then they say click to activate. Installed Belarc Advisor prior to the upgrade but the revealed key doesnt work and both are upgraded from good versions of Windows 7. Now it tells me I can purchase 10 for 199.00..................Fdisk and back to 7 on both machines. Are you serious? Better luck next year!