A windows 7 ultimate installation can normally not change into a minor version of windows 7 home premium or professional.
Windows 7 ultimate to windows 7 professional downgrade.
Be aware that there are no downgrade rights to windows 7 ultimate.
Next insert your windows installation disk select upgrade and your windows 7 enterprise will be downgraded to the version you have specified.
If windows 10 just seems unstable you ll want to go back to your previous version of windows and wait a while longer before attempting an upgrade.
The ultimate version is the higher version of windows 7 and it can t be downgraded to lower versions officially without formatting or doing a fresh installation.
Continue with usual windows 7 installation procedure and let windows upgrade downgrade from windows 7 enterprise to target version.
The time to complete the process should only be several minutes but the time will vary from computer to computer.
Or if you d just rather hang onto windows 7 for a while longer you can downgrade.
Knowing you have windows 7 enterprise tells me this.
If you have installed a preview version of windows 7 ultimate e g.
Download windows 7 downgrader.
Beta release candidate build 7100 or rtm build 7600 and want to install a cheaper version windows 7 home premium or professional the installation is refused.
Note a windows 8 customer who has multilanguage functionality cannot downgrade to windows 7 pro or to windows xp pro.
Unfortunately unless you went through an upgrade process there is no safe way to revert back to older editions.
This is because the multilanguage functionality is exclusive to windows 7 enterprise and is not available for a professional edition.
Anyhow i found a trick to downgrade windows 7 ultimate to professional easily without the new installation.
Simply run the program on windows 7 enterprise edition and select the version you want to downgrade to.