The general rule is, if it runs on Windows 7, it'll run on 8.
I ran it without a problem, if you're upgrading from Windows 7 to Windows 8 on any mainstream brand and model computer, you shouldn't have a problem, Pacnet2012 is just trying to be something important.
I have actually had to get new drivers for all the machines I upgraded to Windows 8 before Blockland worked due to the "Blockland Display Initialization Failed" error, and some people might need it or not.
will I need to download any video drivers