Windows 7 Pro 64bit upgrade edition (see member details for full system info) I copied a C: 300gb OS HD with only about 75 gb on it to a new Crucual 250gb SSD. At the copy time I had the 1TB and a DVD installed. During the install I checked the box "Use all available space for the partition with OS" Everything went smoothly and I rebooted and changed the bios so the new SSD is the first boot. Windows started and all was well, I thought. I noticed the boot up didn't seem very fast though. Next, I changed drive assignments so that the SSD is C:, the 1TB is D:, the DVD is E: and the old 300gb is F: Finally, I completely formatted the old OS 300gb drive. I then tried to physically remove the old F: 300gb and found I couldn't boot up into windows. I tried running the windows repair disk and it couldn't figure out what is wrong. I put the HD back in and it boots up and all if fine again, except that it appears that the system is actually booting from the D:/data drive and not the C:/OS SSD drive. How did this happen? I confirmed this by changing the bios first boot to the second listed D: drive and it boots into windows. Here is the Windows diskconfig shot: http://doanehoag.com/Forums/DiskManagementshot%20c%20bootup.jpg I am not high tech so if someone can explain what to do I am going to need some instructions on how to do it. I read the Migrate OS to SSD manual and I don't understand the part on using WinPE on P11.. am I supposed to do some further changes using that program? It mentions "correcting the Boot Configuration Data (BCD) on p12, but I didn't completely understand it. Any help greatly appreciated.