Use the following command to import the AppLocker PoSh module –.Open Windows PowerShell as administrator.Name this file “clear.xml” and save it in a directory such as C:\temp.Copy the following cmdlet and paste it into the notepad –.Right click on Applocker and then select Clear Policy.Restart the computer and again open Local Security Policy.Uncheck the option Configured and Click on OK.Go to Computer => Policies => Windows Settings => Security Settings => Application Control Policies => AppLocker.Open Local Security Policy (secpol.msc).However, you need to be extra careful because this procedure will delete all your previously created AppLocker rules. If the above methods could not fix – “This app has been blocked by your system administrator error” after KB5019959, and KB5019980 in Windows 10, and 11 then this is the most effective one. Read – What is DISM in Windows 10 (Deployment Image Servicing and Management)? Way-3: Clean up AppLocker Directory and delete AppLocker rules This will scan the image to check for corruption and take time depending on the size and performance of the machine.Sometimes, running the DISM with the parameters /Cleanup-Image and /RestoreHealth helps fix Applocker Error after KB5019959 in and KB5019980 in Windows 10 and 11 –ĭISM /Online /Cleanup-Image /RestoreHealth Repeat the same with “Executable Rules”, “Windows installer Rules”, “Script Rules”, and “Create Default Rules”.On the Services window, find Application Identity and make sure it’s in Running state.Restart the computer and click on Search.Enforce rules must be selected in drop-down. Under Executable rules, select Configured.Now Go to Application Control Policies => AppLocker.This modification will allow everyone to run All signed packaged apps.Right-click and select Create Default Rules.This will fix the AppLocker error message so follow –Ĭomputer => Policies => Windows Settings => Security Settings => Application Control Policies => AppLocker => Packaged app Rules Generally, you enforce AppLocker to run and at the same time you don’t want anything to be prohibited.įor this, you will require clicking on the categories “Executable Rules”, “Windows installer Rules”, “Script Rules”, “Packaged app Rules” and “Create Default Rules”. This error pops up because of AppLocker which can help you determine if your organization can benefit from deploying application control policies. Here is how to fix Applocker Error after KB5019959, KB5019980 in Windows 10, 11 – Way-1: Create Default Rules in Local Security Policy This app has been blocked by your system administrator Applocker KB5019980, KB5019959 The issue occurs even when the AppLocker enforcement is disabled. This problem prevents users from accessing Start menu and Store apps. But if the solutions there don’t work, follow the methods here to get rid of the AppLocker error message. We have already written a post in this concern, Fix This app has been blocked by your system administrator Error in Windows 11. When launching the Store apps or start menu this error message appears restricting their access. Are you coming across AppLocker error after installing an update in Windows 10 or 11? Several users complain about “This app has been blocked by your system administrator” after they received KB5019959 and KB5019980, 08 November 2022 Security patch.
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