Zuig

Right Mouse Click -> Sharing and Security

Why don't you install your software via GPO (MSI) or login script? In this scenario you cn easy target your machines and install the software...

What basically happens is that all your network traffic from the second machine will be redirected through the first computers NIC who is connected to the internet So if your Firewall is properly configured it is protected by your firewall.

Have you tried to add the drivers for your RAID-board during the installation? If I'm not mistaken it is F8