Possible Duplicate: How to remove Ubuntu and put Windows back on? I have no idea what was deleted or uninstalled or even what system ran previously on the computer. The computers are public computers for an office and no one know's how to use this system! Most people can't figure it out and have never even heard of it (I have because I knew someone who ran it)!! So how do I remove it? Is there anyway to just do a virtual restore? I'm hoping it was windows 7 on here previously cause don't most 7 systems have a built in windows installation disk iso? Anyone know how or if this can be fixed?? No we don't have the re-installation disks (if we did I would know the system and not have a problem) HELP!!!!