What breaks when you disable Windows SmartScreen file checking
Windows Defender SmartScreen (a built-in security filter) checks files and websites before you open them to protect your PC from harmful apps. When you turn off this feature, Windows stops verifying unknown files from the web, which lets you run unverified programs without safety warnings but removes your primary shield against malware.
Disabling SmartScreen changes how Windows handles downloads across Microsoft Edge and other apps by removing block screens for unrecognized software. Weigh these security risks carefully before you turn off file checking on your system.
To turn Windows Defender SmartScreen on or off, open the Windows Security app, select App and browser control, click Reputation-based protection settings, and toggle the switches for Check apps and files, Microsoft Edge, and Microsoft Store apps to your preferred state.
How to Turn SmartScreen On or Off in Windows Security
Windows Security lets you turn smart screen on or off using the built-in security dashboard. Open the Start menu , search for Windows Security, and go to App & browser control to manage your reputation-based protection settings and change how Windows handles unrecognized apps and files.
- Open the Start menu , type
Windows Security, and press Enter to launch the security dashboard.
Windows Security - Select App & browser control from the main menu or the sidebar.
- Click the Reputation-based protection settings link under the Reputation-based protection heading.
- Toggle the switches for Check apps and files, SmartScreen for Microsoft Edge, and SmartScreen for Microsoft Store apps to Off to disable the feature, or switch them to On to enable it.
How to Enable or Disable SmartScreen Using Registry Editor
Registry Editor lets you turn smart screen on or off by editing specific system registry keys. Press the Win+R, type regedit, and press Enter to open the editor. Make sure you back up your registry before changing any values to avoid unexpected system errors.
- Press the Win+R to open the Run dialog box, type
regedit, and press Enter to open Registry Editor. - Navigate to the following key in the left sidebar:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender - Look for the relevant DWORD values (registry settings) that control SmartScreen.
- Modify the data value to 0 to disable SmartScreen or 1 to enable it.
- Restart your computer to apply the changes.
Managing SmartScreen via Group Policy
Local Group Policy Editor lets you turn smart screen on or off across multiple computers on Pro, Enterprise, and Education editions of Windows. Press the Win+R, type gpedit.msc, and press Enter to open the policy editor and adjust your security settings centrally.
- Press the Win+R, type
gpedit.msc, and press Enter to open the Local Group Policy Editor. - Navigate to the appropriate policy folder under Computer Configuration or User Configuration.
- Double-click the SmartScreen policy setting you want to modify.
- Select Enabled or Disabled depending on your preference, then click Apply and OK.
- Close the editor and restart your computer.
Bypassing SmartScreen Warnings for a Single File
File Properties lets you bypass smart screen warnings for a single trusted file without turning off protection for your whole computer. Right-click the blocked file in File Explorer , open its properties, and unblock the file on the General tab so you can run it safely.
- Locate the blocked file in File Explorer .
- Right-click the file and select Properties from the context menu .
- Look for a security notice at the bottom of the General tab stating that the file came from another computer and might be blocked.
- Check the box next to Unblock.
- Click Apply and OK to save your changes and run the file normally.
If this didn’t work
Administrator privileges and background security software conflicts are usually why you cannot turn smart screen on or off or why your settings keep resetting after a Windows update . Check your user account permissions or review your third-party antivirus apps if your changes fail to save.
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About the Author
Richard
Tech Writer, IT Professional
Richard is a writer at Geek Rewind who turns complex IT tasks into clear, step-by-step guides. He draws on years of hands-on experience in system administration and enterprise IT operations, focusing on Windows, Linux and WordPress: the problems people actually run into, and the fixes that work. His server and WordPress guides come from systems he runs himself. Richard builds and maintains the platform behind Geek Rewind, from its Ubuntu servers and Nginx configuration to its custom WordPress plugins. Many new tutorials start with readers' questions, and he's always glad to answer them in the comments.
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