At work, they have a small network of office computers...about 12 PCs total. They have 1 server which has some important files, and it has Windows Server 2003 on it. I'm not sure what happened, but the computer became infested with some spyware/malware and they decided to disconnect it from the internet, and just leave it connected to the office network so that they can access the files on it. We want to use an online backup service for some of the files but it requires that the server is connected to the internet. Before we go ahead and reconnect it, we want a clean installation of the OS. I've never worked with a server before, so can I just install Windows 7 on it? Or does it need one of those server OS's?