Solved Re installing Win 7 Pro upgrade to a blank HD

May 1, 2012 at 08:14:32
Specs: Windows 7
My Toshiba laptop came with Win XP pre installed and no back up media. I subsequently purchased and installed Win 7 Pro upgrade. I'm now selling my Toshiba so have wiped the hard disk and am now trying to install Win 7 Pro from my upgrade media but it tells me my keys invalid. I've tried using my Win XP key but it also rejects it. What can I do?

See More: Re installing Win 7 Pro upgrade to a blank HD

Report •

May 1, 2012 at 08:31:27
Sounds strange as there was no upgrade provided from Windows XP to Windows 7. The only thing you could upgrade from was Vista. I had a client who bought the upgrade CD of Win7, and to get it to install I had to first install Vista back on her machine and then run the Win 7 upgrade disk, I suspect you will have a similar issue, but I am not sure how you are going to upgrade from xp?

Report •

May 1, 2012 at 08:32:43
You cannot preform a clean install from a upgrade CD.

The upgrade CD is to move from one version of windows to a newer version.

Since you don't have a install of windows on the new HD you will need to either purchase a full version CD and key or install a previous version (XP or Vista).

If you choose to install an older version, once the install of xp or vista is complete then you will be able to use the upgrade disk and your key will work.

Report •

May 1, 2012 at 08:44:50
✔ Best Answer
"You cannot preform a clean install from a upgrade CD"

Incorrect. Just use the "double install" method. Completely wipe the HDD, repartition/reformat, then install Win7 using the upgrade media. Do NOT attempt to activate or install any drivers or other software! Then immediately install again over the 1st installation. In effect, you will be "upgrading" on the 2nd install.

Report •

Related Solutions

May 1, 2012 at 09:18:58

Easy going:

Every Windows 7 installation DVD is identical.
Therefore, the setup program, which is starting automatically, has no knowledge of, what version to install. In general, all versions are available on the DVD.

So what you have to do is the following:

1. boot from the installation DVD and install Windows 7 without activation code (serial number)
2. when the installation process has finished, windows restarts
3. now you have to make windows believe, that it's not a fresh installation.
    Therefore, create a new folder under C:\ named temp. Copy and paste the following to a new file and save the file as e.g. c:\temp\mediareset.reg




4. click Start and type cmd into the search box
    rightclick the found cmd.exe and run as administrator
    click OK

5. type in cd \temp

6. type in regedit /s mediareset.reg

7. now we have to reset the license status of windows:
    again at the command prompt, type:
    slmgr -rearm

8. when you get back the blinking cursor, you have to restart windows

9. back in windows after restart, press WIN+BREAK keys
    you should get a window, where you have to type in the activation code
    do so, and you should get your windows registered and activated

Hope that helps.

Report •

May 1, 2012 at 11:24:18
Hi guys
Many thanks for such quick and positive replies. I'm trying riider's suggestion first and if that fails I'll try paulsep's. If still no luck it looks like I'll have to buy a copy of a Windows 7.
I'll get back to you and let you know what happens, in the meantime, thanks again. ;-)

Report •

May 1, 2012 at 12:03:02
Well done Riider! It worked, laptop now running Windows 7 and all's well. Thanks again. ;-)

Report •

May 3, 2012 at 13:55:51
My mistake..

I was not aware of the workaround..

Thank you for the information!

Report •

Ask Question