Windows users can access and edit the Windows registry through the command line. Review the sections below for the version of Windows on your computer and information about registry edit commands and syntax. If you're attempting to edit the registry from the command line because you're unable to get to normal Windows, try first booting to Windows Safe Mode.
Then, run Regedit from Safe Mode. In the Command Prompt, type regedit and press Enter. Microsoft Windows XP and later users can view, edit, and modify their registry from the Command Prompt application using the reg command. See the reg command page for additional information and examples. By default, Microsoft Windows 95, 98, ME, and users can import registry files from the command prompt using the Regedit command. Using this command and a registry file containing the proper commands, a user can add, remove, and otherwise edit the registry from the command line.
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Assuming the keys and values you made changes to were doing something prior to your change, expect some kind of change in behavior after you restart your PC. If that behavior isn't what you were after, it's time to dig up that backup you made. As crazy as it sounds, you might sometimes need to delete a registry key or value, most often to fix a problem, likely caused by a program that added a particular key or value it shouldn't have.
The UpperFilters and LowerFilters values issue comes to mind first. These two registry values, when located in a very particular key, are regularly the root cause of certain errors you'll sometimes see in Device Manager. Don't forget to back up, and then follow these steps exactly to remove a key or value from the Windows Registry:. Start Registry Editor by executing regedit from any command-line area in Windows. See How to Open Registry Editor if you need a bit more help than that.
From the left pane in Registry Editor, drill down until you locate the registry key you want to delete or the key that contains the registry value you want to remove. Once found, right-click or tap-and-hold on it and choose Delete. Remember, registry keys are a lot like the folders on your computer. If you delete a key, you'll also delete any keys and values that exist within it!
That's great if that's what you want to do, but if not, you may need to dig a bit deeper to find the keys or values you were really after. Next, you'll be asked to confirm the key or value deletion request, with either a Confirm Key Delete or Confirm Value Delete message, respectively, in one of these forms:.
In Windows XP, these messages are slightly different:. Whatever the message, select Yes to delete the key or value. The kind of thing that benefits from a value or key removal is usually the kind of thing that requires a PC restart to take effect. Hopefully, the answer to both questions is no , but if not, undoing what you've changed, added, or removed from the Windows Registry is super easy, assuming you backed up, which we recommended above as the first thing you should do.
Dig up that REG file your backup created and execute it, which will restore those saved sections of the Windows Registry back to where they were before you did anything. See How to Restore the Windows Registry if you need more detailed help restoring your registry backup. Actively scan device characteristics for identification.
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