I have a Win 7 OS on my laptop but I had Vista before and got the Win 7 through an "upgrade" disc and key that came with it.
I want to format the HDD and reinstall my OS but I don't have any OS discs other than the upgrade disc for win 7 (i.e. i dont have the vista OS disc seeing as it was pre-installed on the laptop and is on OEM version; no recovery discs were provided).
How do I go about it? Would my upgrade disc and key work if I were to use them right after formatting?
As long as you haven't changed the motherboard you can do a clean reinstall by booting to the upgrade CD.
You can find more information in regards to the different versions of Windows 7 HERE.
Thank you for your reply and the link to the post above. I could not find any information under the upgrade version of Windows 7 that states I can do what you said though. I will not have a chance to "go back" in any way so need to be sure (hope you don't misunderstand) as I will be using Darik's Boot and N to clear the data on it... So you are saying that if there are no hardware changes, I am good to go and the upgrade disc will work after inserting the disc after I have wiped the drive clean?
(It does say that my new licence is valid and the old one no longer works (which means that I cannot use the Vista key printed on the underside of my laptop anymore to re-install Vista and then upgrade to Win 7) but it also says that I can move my Win 7 upgrade licence to another computer as well... )
Yep you'll be fine using the Upgrade disk to do a clean install -- It may not activate automatically but the phone activation process will work - (If it fails and you are connected to a live rep they will merely ask for the key from the original VISTA and the upgrade key and after you give them those they will provide a new activation code for you to enter - though chances are the phone activations automated computer will activate the install without the need to actually talk to anyone !)