Is this a computer or controller? Who is the manufacturer?
In a search I did find a Homeseer Pro100 is this what you have? If this is what you have. The link below may assist you. It mentions a USB System restore Flash drive you can purchase and it would also put the OS on a D: drive partition. Have you looked to see if you have a D: drive and the back OS is there? Also a list of supported devices does show Insteon interfaces with an optional a software add on purchase or using a third party add on. http://store.homeseer.com/store/HomeSeer-PRO-100-S3-Home-Automation-Controller-P799.aspx#