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  1.    05 Sep 2017 #1
    Join Date : Feb 2015
    Posts : 225
    Windows 10 Enterprise LTSB

    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.    05 Sep 2017 #2
    Join Date : Oct 2016
    Caledon, Ontario, Canada
    Posts : 3,978
    Windows 10 Pro Build 1703

    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
    Join Date : Feb 2015
    Posts : 225
    Windows 10 Enterprise LTSB
    Thread Starter

    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.    05 Sep 2017 #4
    Join Date : Oct 2016
    Caledon, Ontario, Canada
    Posts : 3,978
    Windows 10 Pro Build 1703

    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
    Join Date : Feb 2015
    Posts : 225
    Windows 10 Enterprise LTSB
    Thread Starter

    Edit, it's not working after rebooting. Back to square one.
      My ComputerSystem Spec
  6.    05 Sep 2017 #6
    Join Date : Aug 2016
    S/E England
    Posts : 4,488
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by xdarkmario View Post
    i had a virus on my pc and i got it out but my windows defender is damaged....
    Quote Originally Posted by xdarkmario View Post
    I actually got it working by forcing to safe mode via command prompt and then changing back to regular mode via msconfig.
    Quote Originally Posted by xdarkmario 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
    Join Date : Feb 2015
    Posts : 225
    Windows 10 Enterprise LTSB
    Thread Starter

    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.    05 Sep 2017 #8
    Join Date : Aug 2016
    S/E England
    Posts : 4,488
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by xdarkmario 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
    Join Date : Feb 2015
    Posts : 225
    Windows 10 Enterprise LTSB
    Thread Starter

    Quote Originally Posted by Bree 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.    05 Sep 2017 #10
    Join Date : Oct 2016
    Caledon, Ontario, Canada
    Posts : 3,978
    Windows 10 Pro Build 1703

    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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