I was trying to figure out which drive was my D drive in order to format it, so I connected it to another computer via a USB to SATA adapter. I think when I connected it, some firmware or something was installed on the drive possibly so that my 2nd computer could ready it. That's it. I just looked at the contents of the drive, then reconnected it to my main computer. Unfortunately now the drive won't boot up. My files are all there but I got a NTLDR missing error, then a message saying that the drive can't be found. Any suggestions on a way to fix this?