In my office we have a small network of computers. There is one server, which has actual server hardware in it though it has Windows 7 on it instead of Windows Server 2008 or anything like that. And then there are about 8 PCs connected via a network switch. A couple of weeks ago, some folders and files were missing. At first I thought maybe someone deleted something by accident but too many things were missing and in random places, so I do not believe human error is the cause here. So I restored the files and didn't think much of it, but it happened again yesterday. It seems like less files have disappeared this time around, but the ones missing this time seem to be the same ones missing from last time. I also noticed it happened in the middle of the work day, because I made use of one of the folders in the morning and it was missing by afternoon. I've never really dealt with an issue like this before, and sadly I'm the closest thing we have to an IT guy here. All I can think of is that one of the hard drives is going bad? There's two HDDs in a Raid 1 array I believe. What else could it be? Before these two incidents, the PC had been problem free for about 1.5 years.