With the release of Windows7, many users have used this new operating system, and the majority of users with dual systems. Building a dual system is very simple, then how to uninstall the Windows7 under the dual system has puzzled a lot of users. Here are some of the techniques we've collated to help users who need to uninstall Windows7.
1. Insert the engraved Windows7 installation disc (or load the Windows7 mirror with the virtual CD-ROM).
2. Click "Start"-"run" and pop up the command line window.
3. Enter X:bootbootsect.exe/nt52 all/force in the Command Line window, and then press ENTER. (Note: X: represents your optical drive letter, or the virtual CD drive letter.) For example, if the DVD drive letter is F, type f:bootbootsect.exe/nt52 all/force.)
4. Eject the Windows7 installation CD (or uninstall the ISO image file in the Virtual CD drive).
5. Restart the computer, and the computer will start with a previous version of Windows that is already installed. The startup entry for the WINDOWS7 system is missing, Early Version windows is gone, and only the Windows XP startup item is left, which is basically successful.
6. Manually delete Windows7 files and folders, such as program files, users, and Windows folders. Or there are no other important documents, you can directly format the WINDOWS7 partition, save time and convenience.