Windows 10: how to re-install windows defender that missing from computer?

after I updated security intelligence for windows defender, my windows defender had an error and couldn't be opened, after I tried to repair and reset windows security, my windows security actually disappeared from the computer. I have tried downloading from the Microsoft Store but it can't be installed.

:)

 

windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Windows Defender is out

I was working on a computer infested with adware, spyware, and whateverthehellware a while ago. The beta version of Windows Defender found a few things that AVG, Adaware, and Spybot missed.

 

Windows defender won't open-doesn't seem to be installed

Hi Becky,

One of the possible reasons for your Windows Defender concern is corrupted or missing system files. However, we still need to investigate the Windows Defender issue you're experiencing, kindly provide the information needed below:

• What troubleshooting steps have you done so far?
• You have mentioned that you reloaded Windows 10 on your computer, just to verify, did you perform a clean install of Windows 10?
  

Regards.