i cant start windows defender after a virus on my pc error 0x800700aa Solved

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  1.    05 Sep 2017 #1

    i cant start windows defender after a virus on my pc error 0x800700aa


    i had a virus on my pc and i got it out but my windows defender is damaged. i already did all the scans like sfc and removed the virus but i cant re enable the windows defender, i just get 0x800700aa.
      My ComputerSystem Spec

  2. Caledon Ken's Avatar
    Posts : 11,617
    Windows 10 Pro x64 Build 1803
       05 Sep 2017 #2

    Hi xdarkmario.

    If you are absolutely sure the pest is gone you could try an in place repair / upgrade. I would backup my data files at a minimum and would even consider creating an image with a toll like Macrium Reflect.

    Repair Install Windows 10 with an In-place Upgrade

    This process will upgrade you to V1703 if you are not already using Creator Update, FYI.


    Ken
      My ComputerSystem Spec

  3.    05 Sep 2017 #3

    I actually got it working by forcing to safe mode via command prompt and then changing back to regular mode via msconfig.
      My ComputerSystem Spec

  4. Caledon Ken's Avatar
    Posts : 11,617
    Windows 10 Pro x64 Build 1803
       05 Sep 2017 #4

    Great. The repair process listed in the tutorial may fix other things that your bug caused that you have not experienced yet. No need to run now but if you do find some other quirky things you can look at it.

    Thanks for posting your solution.
      My ComputerSystem Spec

  5.    05 Sep 2017 #5

    Edit, it's not working after rebooting. Back to square one.
      My ComputerSystem Spec

  6. Bree's Avatar
    Posts : 9,593
    10 Home x64 (1809) (10 Pro on 2nd pc)
       05 Sep 2017 #6

    xdarkmario said: View Post
    i had a virus on my pc and i got it out but my windows defender is damaged....
    xdarkmario said: View Post
    I actually got it working by forcing to safe mode via command prompt and then changing back to regular mode via msconfig.
    xdarkmario said: View Post
    Edit, it's not working after rebooting. Back to square one.
    Seems you did not in fact get everything out. Apparently there's a process left that's disabling Defender when you restart. What did you use to try and get rid of the virus?

    My first step would be to run Rkill. That will stop known malicious services then, without restarting, immediately run AdwCleaner.
    https://www.bleepingcomputer.com/download/rkill/
    https://www.malwarebytes.com/adwcleaner/
      My ComputersSystem Spec

  7.    05 Sep 2017 #7

    I ran adw cleaner, I'm not getting the browser popups a i did before and looking on the task manager there's no apps running that are out of place
      My ComputerSystem Spec

  8. Bree's Avatar
    Posts : 9,593
    10 Home x64 (1809) (10 Pro on 2nd pc)
       05 Sep 2017 #8

    xdarkmario said: View Post
    I ran adw cleaner...
    What did it say it found? AdwCleaner writes its log to a text file in C:\AdwCleaner
      My ComputersSystem Spec

  9.    05 Sep 2017 #9

    Bree said: View Post
    What did it say it found? AdwCleaner writes its log to a text file in C:\AdwCleaner
    this

    all it did was complacently remove my defragging app, i have to reinstall that -__-

    # AdwCleaner 7.0.2.1 - Logfile created on Tue Sep 05 09:50:02 2017 # Updated on - Pastebin.com
      My ComputerSystem Spec

  10. Caledon Ken's Avatar
    Posts : 11,617
    Windows 10 Pro x64 Build 1803
       05 Sep 2017 #10

    Looks like it took a number of keys out of registry.

    Have you tried the in place repair / upgrade? (with the backups in place)
      My ComputerSystem Spec


 
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