Using Windows XP Professional (SP2), I recently tried to clone the contents of a 160 GB Maxtor SATA 1 hard drive to a brand-new 250 GB Western Digital SATA 2 hard drive using True Image 10 (trial version). There were no errors during the actual cloning process, shut down the computer after it was done, restarted it just to make sure everything was complete, then shut it down, opened it up, and took out the old drive, putting the new drive into the primary SATA slot. Upon starting the computer up now, I get the error "Cannot boot operating system" (or something along those lines, don't remember the exact error). I have since been forced to put the old hard drive back in and use it for the time being. I'm not sure what the problem is, has anyone experienced the same error?