How to downgrade win7 Ultimate Edition to win7 Home Premium Edition

1. First click “start —run”, enter the regedit command in the run dialog box, press Enter to open the registry editor;

2, in the open registry editor, the credit is located in turn : HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersion item;
3, modify the value of "ProductName" in the right window is "Windows 7 HomePremium", and then modify the value of "EditionID" to "HomePremium", so that the installer feels the current The system is a lower version (Reminder: the modified registry value name must be the same as the system name on the installation disk);
4, after reinstalling with the original installation CD and re-activating it, you can downgrade successfully. Oh.