I was using a software for the BCDEDIT to enable dual boot.
Software Name: Vista Multi Boot PRO_3.3.0
Try to google it, may be you can find something, there are other software that can do that as well.
All the best,
Thanks for the answer Aryan: I now have Windows 7 and the problem has disappeared. Windows 7 was not the answer, though, I suspect I was altering the boot order and not pressing "enter" before saving with F10. A beginners error I guess!
All the best and I hope this helps someone!