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I will be installing windows 7 Professional purchased from microsoft. Following your example discussing the upgrade from RC1 to RTW will I have problems with the install since I will trying to upgrade or rather downgrade windows Ultimate to windows 7 Professional. I would sincerely appreciate any input you can provide. My reason for asking this is due to the fact that I have very successively used RC1 as my primary operating system since it was made available to the general public. Have only experienced a couple of minor problems to date.

Thank you for your help.

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migrated from Oct 16 '09 at 15:14

This question came from our site for professional and enthusiast programmers.

Normally, the Windows 7 installer won't let you downgrade. However, there is a hack that will allow you to do it. The instructions are here.

That being said, I would advise a fresh install. Good luck.

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fresh installs are 99.999% of the time better than trying to futz with an "upgrade" install. Though of course, they do require a little extra work to preserve desired settings and whatnot (though a lot of that can be mitigated by re-pointing all your "My" folders and storage to a seperate harddrive from your OS installation). – eidylon Oct 16 '09 at 16:29

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