Re-install Windows 7 after upgrading to Windows 7 Ultimate

Hello

I bought this computer 4 years ago, it came with Windows 7 Home Premium (64 bit) preinstalled. About a year and a half later, I bought the upgrade to Windows 7 Ultimate. Well well, long story short, I messed around with some settings (without a saved image), and I am looking to re - install.

Now, here's my question. The key of Windows 7 Ultimate upgrade will still be usable once I re - install Windows 7? And if not, will the OEM keys still work?

The two keys are still usable.

If you have the DVD of Windows 7 Ultimate, you could install using this tutorial.

http://www.SevenForums.com/tutorials/31402-clean-install-upgrade-Windows-7-version.html

Tags: Windows

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