Ok so i built a PC for a friends son and its been running fine until now. Pushing the power button gets me to this: File missing or currupt Windows/System32/Config/system So i boot from the CD and try both Repair and then Install a fresh copy options. That gets me to this: No HDD Now i take his SATA HDD and plug it into my PC and i can read it fine. Browsing to the File it says is currupt i can see my file and his file are different sizes. 1. How can i get his system to boot without it seeing the HDD, which also appears to be fine as i can veiw its contents from my PC when its connected to it. I can get into the bios but that isnt helping me. It does show the HDD is SATA but i cant reinstall windows or perform the Repair option cause it says no HDD present. WTF, any ideas ? AS Wanna kill these ads? We can help!