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I don't think that's true. I assume you're referring to:
"13. UPGRADES. To use upgrade software, you must first be licensed for the software that is eligible
for the upgrade. Upon upgrade, this agreement takes the place of the agreement for the software
you upgraded from. After you upgrade, you may no longer use the software you upgraded from."
That's a fair requirement, though it doesn't say that you are unable to use Windows XP should you decide to discontinue using the Vista license. The above I believe only applies to an active use of the Vista license.
It also says:
"15. REASSIGN TO ANOTHER DEVICE.
a. Software Other than Windows Anytime Upgrade. You may uninstall the software and install it on another device for your use. You may not do so to share this license between devices."
I don't see any issue with uninstalling Vista then continuing to use Windows XP.
You are correct when you say:
it doesn't say that you are unable to use Windows XP should you decide to discontinue using the Vista license.
However, it doesn't say that you are able to either. All is actually says is that once you upgrade, you may no longer use the software you upgraded from.
If you only abide by the text of the agreement (and I am confident that Microsoft will do just that) you may not go back to your old XP license irrespective of whether you are still using Vista.
If you think about it, there is only one reason MS would include a clause like this, and that is to stop people going back to XP.







Member since:
2005-11-12
Due to Microsofts EULA, if you upgrade your XP you´re no longer allowed to use it. So if Vista doesn't work well you can´t go back to XP without buying a new copy. Kind of weird.
Look at the "upgrade" part of the EULA:
http://download.microsoft.com/documents/useterms/Windows%20Vist...