1, first click "Start → control Panel → management tools → Computer Management → Disk Management", and then the confusion of the disk to set the appearance you want, and then restart the Windows7 operating system, this time will appear error prompts, and can not access the desktop;
2, at this time on the keyboard press "WIN+R" key combination to open the "Run" window, and then click "Browse" to find the Windows 7 installation CD under the Setup.exe, click "OK" to start the Windows 7 installer.
3, when the installer needs to choose an upgrade or a new installation, be sure to choose a new installation, so that after the installed, Windows 7 will not change the system drive, and the old windows 7 will be automatically backed up by the installer to a windows.old directory, delete it, so you can solve the problem of the system disk disorder.