I get the following message (I have seen this question previously, but my circumstances are different). We apoligize for the inconvenience, but Windows did not start successfully. A recent hardware or software change might have caused this. There is more verbage then I get the following start choices: Safe Mode Safe Mode with Networking Safe Mode with Command Prompt Last Known good Start Start Windows Normally No Matter what i select my PC just reboots and gets to the same point etc etc. I just received a new (different/used) computer sans hard drive. I removed my hard drive from the old computer and installed it in the new computer. However, I get the above message. Thinking I may have installed it improperly, I reconnected the hard drive to the old computer and the computer booted up fine. I reinstalled the hard drive into the new computer and I still have the same problem. I thought I would reformat the hard drive (the data is backed up) using the Windows XP Pro install disk, but the computer does not read the disk from the CD ROM drive. I have checked the BIOs to determine boot order etc., and everything looks okay. I have checked cable connections (even removing it once (and I got a unable to read error at the time the cable was not connected to the CD ROM Drive)) and everything is okay. Has anyone ever had this problem? Help...!