I currently own a used toshiba laptop which I received with a shot harddrive and CD-ROM drive. I replaced the harddrive, and then the CD-ROM drive with one of the same model. BIOS didn't recognize the cd-rom drive, therefore not allowing me to install Windows XP. So then I bought an adapter for the laptop harddrive to connect into my desktop computer. This worked successfully, and I installed Windows XP on the harddrive. It worked great, so then I shut down, and took out the laptop harddrive, and put it into the laptop, just go get a Disk Read Error bullshit. There is nothing at all wrong with the harddrive, it works fine. What now, I'm screwed? I really don't want to give up on this because I have invested over $100 dollars in this and it would be really nice not to have that $100 and countless hours trying to fix this be tossed into the trash. Can someone tell me what could be wrong? Thanks.