Hi, very frustrating problem I have with this laptop I received. It is an Acer Aspire 4720z. I have tried 3 different file sources to get an XP ISO working with this, none have been working. Every time The install is finished, I restart and it tells me it cannot find the OS (I forget the actual error, maybe it was corrupted or something like that? I have windows 7 on it at the moment and don't want to risk losing it all together). I have used ImgBurn on disks, and WinUSBMaker on USB drives, both have the same problem. ImgBurn on a Windows 7 ISO worked perfectly. What is going wrong here?