Bypass this annoying security flaw
Fix you need a new app to open this windows defender link windows 11/10
Are you getting the error "You'll need a new app to open this windowsdefender link" when you try to launch the Windows Security app? If so, your app or PC may have corrupt files or incorrect settings. We'll show you how to fix them to get Windows Security working.
Most of the time, the above issue is caused by a problem in the Windows Security app. Other reasons for the error include Windows bugs, interference from a third-party antivirus program, and more.
An easy way to fix most problems in Windows is to restart your PC. This will fix many minor glitches in the system, giving you a bug-free experience with your apps.