As recently learned from Win7 Weibo: The Registry of the WIN7 system contains complex system information that is critical to your computer, and incorrectly changing the registry may cause your computer to be unable to operate. When we really need to modify the registry, regardless of any changes, be sure to back up the registry, save the backup copy to the security folder or USB drive, if you want to cancel the changes, import the backup copy of the registry, you can restore the original.
The method for backing up the registry in the WIN7 system is as follows.
Left mouse click Win7 System Desktop lower left corner of the circular "Start" button, in the Search box type "regedit", press Enter or use the mouse to click the search program, you can open Registry Editor. Sometimes the EC prompts for an administrator password or UAC confirmation.
Special Note: You must be logged on as an administrator to import the complete information, and if you are not logged on as an administrator, you can only change the settings that apply to the current user account.
Locate the key or subkey that you want to back up in the registry, and click Select.
Click "File-Export" menu. (If we need to import the registry, select "Import" in this interface.) )
In the Export Registry Files panel, in the Save in box, select the folder location where you want to save the backup copy, and then type the name of the backup file in the File name box.
When you click Save, the current registry information is saved in a. reg file, and if there are any errors or problems with the registry, we can use similar steps to import the saved registry information into the WIN7 system to easily resolve the problem caused by the registry error.
Also, before we edit the registry, it is a good idea to use System Restore to create a restore point. The restore point contains information about the registry that you can use to cancel changes to the system.