I have deployed 400 computers with Windows 7, and activated them with the OEm key supplied from HP. That was 6 months ago and everything was fine. Now I am geting random PC's popping up say I am not running genuine microsoft. I spent more than 4 hours on the phone with Microsoft, before they told me to reinstall and reactivate. Would there be a chance the activation that needs to happen every 90 days is being blocked by the firewall. Any help would be great. I have aobut 15 pc's with this issue.