Windows 10: windows defender not working page not available your IT admin.

before telling me i have an anti virus
i probably dont because i uninstalled avast a while ago so i could use windows defender but i forgot i had this problem for almost a year now
i checked if i have any anti viruses like mc afee or anything else but i didn't find anything so i dont know what the problem is

:)

 

admin password?

You can reset the Admin Password using Windows XP repair; See Here for step by step.

*Toast :toast:

 

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

 

Windows Defender Not Working in Windows 10

Hello,

Thank you for keeping us posted on the status of the issue.

We appreciate your patience on this issue. I would like to assist you further on this issue.

Error 577 Windows Defender error codes are caused in one way or another by misconfigured system files in your windows operating system, which may be caused by windows system files damage.

Please be informed that In order for Windows Defender to run, it will require that the
Windows Defender Service remain "Started" (running) and set to "Automatic". Also, certain 3rd party antivirus programs are mainly responsible as it turns off the Windows Defender when they are installed.

Please follow the below methods.

Method 1

This issue may happen due to system file corruption. I suggest you to run System file checker. System File checker (SFC) scan is done to check if there are any corrupted system files that could be causing this issue. Kindly follow
the below given steps:

• 
  Press Windows key + X, select
  Command prompt (Admin) to bring up elevated Command prompt.
  
• 
  In Command prompt type
  sfc/scannow and press enter.
  
• 
  Restart the computer.
  
  If no corrupted system files were found in the previous state, then I suggest you to try the following steps:
  

• 
  Open command prompt by pressing Windows key + X and selecting “Command prompt admin”.
  
• 
  In command prompt, type the following commands and press Enter after each command:
  
  DISM.exe /Online /Cleanup-image /Scanhealth
  
  DISM.exe /Online /Cleanup-image /Restorehealth
  

• 
  Close the command prompt and restart the PC and check if it works.
  

Method 2

Please follow the below steps to set the right registry entry and check if it helps.

• Press Win key + R. This will open Run.
• Type "regedit" and hit enter.
• Navigate to these keys:
  
  HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender
  
  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender
• Change value of 'DisableAntiSpyware' and 'DisableAntiVirus' from '0' to '1'.
• After changing the values go to 'C:\Program Files\Windows Defender' and open 'MSASCui.exe' file.

Hope the above information was helpful. If you need further information, feel free to write to us and we would be happy to help you.

Thank You.