If when you try to open Windows Security Center or any other Settings page on Windows 11/10, you receive an error prompt stating Page not available, Your IT administrator has limited access to some areas of this app, then this tutorial is intended to help you. The error is related to the Windows Security or Windows Defender app, where part of the application is not accessible. It can be the App and Browser control or Device Security or any section of the Windows Security app. In this tutorial, we will identify the potential causes, as well as provide the most suitable solutions you can try to successfully resolve the issue.
1. Change your user account to an administrator account
You usually don't need administrator rights to access Windows Security. However, make sure you are logged in to an administrator account to ensure you have full system permissions. If you are using a standard account, change it to an administrator account. You can do that using one of the methods outlined in this guide to changing user account type in Windows.
2. Uninstall Third-Party Security Software
Have you installed a third-party antivirus app on your PC? If so, that security software could be by conflicting with Microsoft Defender and causing the “Page not available” error. Try uninstalling the third-party antivirus utility you’ve installed with a method in our guide to removing Windows software. Or utilize a dedicated removal tool for your antivirus app if there’s one available.
3. Remove Any Work or School Accounts
Have you connected your PC with any school or work organization account? If so, such an account could be restricting access to Windows Security settings. Try disconnecting your PC from the school or work in Settings as follows:
1. Bring up Settings and click that app’s Accounts tab (or category).
2. Scroll down to select the Access work or school navigation option.
3. Click a connected work or school account to expand it.
4. Press the Disconnect button and select Yes.
4. Disable the Turn Off Microsoft Defender Antivirus Policy
Some Windows Pro and Enterprise users have confirmed they’ve fixed the “Page not available” error by disabling a Turn off Microsoft Defender Antivirus policy. So, check that policy setting even if you can’t recall changing it yourself. This is how you can check and disable the Turn Off Microsoft Defender Antivirus Group Policy setting in Windows Pro and Enterprise:
1. To access the file search box, hold the Windows key + S.
2. Type gpedit.msc inside the file search box.
3. Double-click gpedit.msc to open the Group Policy Editor window.
4. Next, double-click Computer Configuration and Administrative Templates within Group Policy Editor’s sidebar.
5. Expand the Windows Components folder in the sidebar.
6. Click Microsoft Defender Antivirus to select that policy.
7. Then double-click Turn off Microsoft Defender Antivirus.
8. Click Disabled if the Turn off Microsoft Defender Antivirus policy is enabled.
9. Select the policy’s Apply and OK options.
10. Double-click Allow antimalware to startup with normal priority and select to disable that policy as outlined in the previous two steps as well.
11. Next, click Client Interface within the Microsoft Defender Antivirus settings.
12. Double-click the Enable headless UI mode policy to view it.
13. Select Disabled > Apply > OK in the Enable headless UI mode policy window.
5. Run a PowerShell Command
Running a set-MpPreference PowerShell command is a widely confirmed potential resolution for the “Page not available” error. The confirmed command disables Microsoft Defender’s UI lockdown mode. You can run that PowerShell command like this:
1. Activate the Windows search utility.
2. Input a PowerShell search phrase to find that command-line app.
3. Open PowerShell with elevated permissions by right-clicking the search result for that command-line app and selecting Run as administrator.
4. Input this MpPreference command and press Return:
set-MpPreference -UILockdown
5. Exit PowerShell and open Windows Security again to see if the error persists.
6. Repair/Reset Windows Security
Windows Security is a UWP app for which you can select Repair and Reset Settings options that can resolve various issues. Those options are there to help users fix apps that aren’t working right. So, try selecting Windows Security’s Repair and Reset options to see if they make any difference.
Our article about resetting Windows apps tells you how to access the Reset button. The Repair button is just above the Reset option. It’s recommended to select Repair first since that doesn’t affect app data.
7. Modify the Registry via Command Prompt
Users also confirm that running a series of Command Prompt commands that modify the registry can resolve the “Page not available” issue. As those are reg delete commands, we recommend you back up the registry before applying this potential fix. Then try running the registry commands for erasing policies like this:
1. Open the utility for finding files and apps with the Windows Keys + S
2. Find the Command Prompt by typing in a CMD search phrase.
3. Click the Command Prompt app with the mouse’s right button to select a Run as administrator context menu option.
4 Execute the following commands separately, pressing Enter after inputting each one:
reg delete "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies" /f
reg delete "HKLM\Software \Microsoft\WindowsSelfHost" /f
reg delete "HKLM\Software\Policies" /f
reg delete "HKLM\Software\WOW6432Node\Microsoft\Policies" /f
reg delete "HKLM\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Policies" /f
reg delete "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender" /v DisableAntiSpyware
reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies" /f
reg delete "HKCU\Software\Microsoft\WindowsSelfHost" /f
reg delete "HKCU\Software\Policies" /f
reg delete "HKLM\Software\Microsoft\Policies" /f
5. Input exit in the Command Prompt to close the app.
Open the Start menu, select Power, and press the Restart button.
Start Utilizing Windows Security Again
The potential solutions covered in this guide address many of the primary causes for that error occurring. So, they’ll probably get the “Page not available” error sorted on most users’ Windows 11/10 PCs. Fixing the “Page not available” error will enable you to access all the settings in Windows Security again.
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