Windows 10: MS Defender - Page not available

Dear all,I'm experiencing an issue with Windows Defender on Windows 11. When I try to open Windows Defender or right click a file and select Scan with Microsoft Defender the Security Center opens and a dialog stating Page not available appears. This happens on a freshly installed copy of Windows 11 troubleshooting -> reset PC -> cloud install with local admin account. See system info and screenshots showing the account and the dialog below.Apparently I'm not the only one experiencing this issue.---Host Name: &n

:)

 

Windows Defender error: Page not available

Hi,

Thank you for writing to Microsoft Community Forums.

We understand your concern as you are unable to access
virus and threat protection on your PC. In order to get clarity and to assist you accordingly, please reply with the answers to the questions below:

• What is the make and model of the PC?
  
• Do you have any non-Microsoft Antivirus/security program installed?
  
• Are you aware of any changes on the PC prior to this issue?
  
• Does the PC connected to a domain/organization network?
  

Meanwhile, we would suggest you to perform these methods and check.

Note:
Important this section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection,
back up the registry before you modify it. Then, you can restore the registry if a problem occurs.

Follow the steps to take backup of registry.


Method 1: Reset Windows Defender.

1. Press Windows + R key to open Run command.
   

1. Type Regedit and hit the Enter key.
2. When the Registry Editor opens, navigate to the following location:
   HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\
3. Look for Windows Defender then delete it.
   
4. Restart the PC and check.
   

Method 2: Change Registry settings

1. Press Windows + R key to open Run command.
   

1. Type Regedit and hit the Enter key.
2. When the Registry Editor opens, navigate to the following location:
   HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\SecurityHealthService.
3. Click on SecurityHealthService and observe the
   DWord value for "Start" in the right pane.
4. If the value is set to 4 then double click on Start and under Value data change it to 2
5. Click OK, close registry editor and restart the PC to check.

Regards,

Aditya Roy

Microsoft Community – Moderator

 

MS Defender Won't Load After Upgrade to Windows 10 Ver 1511

Attempted every step in document provided by Microsoft

Redirecting

Nothing worked, HOWEVER, the last step is to Delete Conflicting Registry Entries. My registry contains one of the entries listed (MsMpEng.exe) however, REGEDIT could not delete this entry as I was directed.

Problem still exists; as soon as I start MS Defender, it stops.

Any further suggestions?

 

TPU Minecraft Server

Done. Thanks for the suggestion!*Toast :toast: