Check if there are any values whose data references “MRT” or “MRT.exe”.Expand each branch, especially “ 0” and “ 131072” and expand their subkeys.Backup the “ codeidentifiers” registry branch by exporting it to a registry file.Navigate to the following key: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\safer\codeidentifiers.Launch the Registry Editor (regedit.exe).Follow these steps to remove the corresponding registry-based policy key: On Windows 10/11 Home Edition, you won’t find the Local Security Policy console. Exit the Local Security Policy console.Right-click on that rule (if exists), and choose Delete.In the right pane, check if there are any Path or Hash rules that are set to block MRT.exe.Expand Security Settings → Software Restriction Policies → Additional Rules.Launch the Local Security Policy ( secpol.msc) applet.To remove the relevant policies that are blocking MRT.exe, follow these steps: Windows 10/11 Professional Edition and higher If you’re sure that the system is clean from malware, then proceed further.) (First, make sure to run a thorough virus scan using the latest definitions. The “app has been blocked” error implies that MRT is most likely blocked by a custom software restriction policy or AppLocker setting. If some policy settings are blocking MRT.exe from running, this article will tell you how to remove those policies and enable MRT.įix: MRT.exe Blocked by System Administrator If MRT or MSRT is blocked, then it could be the handiwork of some malware (or in the aftermath of malware removal) on the computer. This tool scans for a specific, prevalent malicious software, which amounts to a small subset of all the malicious software that exists today. MSRT is a tool to remove infections from the computer. This app has been blocked by your system administrator.Ĭontact your system administrator for more info.
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