Hi, So, I am trying to fix my friends computer and I decided to just give her my little brothers old computer and put her hard drive in it. The hard drive crashed to do faulty memory in her other computer. So, I reformatted it and its working properly. The computer I am putting it in was a computer that some guy built. There was nothing wrong with the actual computer. My brothers hard drive died and he just ended up buying a laptop. Anyway, this computer used to run Windows XP and that is what is installed on my friends hard drive. When I put her hard drive into the computer for the first time it gave me a list of errors and took me into BIO's to do things like set the time etc. It also gave me a drop down menu of OS so I could choose which I was running. Only problem is, Windows XP isn't even on the list. I can choose: Windows 98/2000 or Other. When I choose other it takes me to a black screen with a flashing cursor and just sits there. When I change the pin on the hard drive to the 'Master with Slave present' (which was where the pin was placed on the hard drive to begin with) it says 'Operating System cannot be found.' When I take the pin out completely it just sits on the black screen with the cursor. Suggestions anyone?