Many users reporting the issue only occurs when running Windows Defender on Windows 10, while some report receiving the code 0x800700aa at startup. The problem only appears for some users when they run Windows Defender, while yet other users see the error code on every start-up attempt. Today we Are Guide about the “How to Fix Windows Defender Error 0x800700AA on Window 10 .”

After taking a closer look at this issue, it turns out that a number of different causes might be contributing to the occurrence of the 0x800700aa error code.

Solution 1: Fix 0x800700AABA error in Window by Using SFC Tools (System File Checker process)

  1. Open the Start and Search Cmd (Or Press Win key+ S and Search Cmd)
  2. Right, Click on the “Command Prompt” then “Open Run as Administrator.”
  3. Type the following command, and then press Enter                                                                                         
                   “sfc /scannow
  4. The repair process takes several minutes for the completion of the process.

Note: Do not close the Command Prompt until the verification is 100% complete

Solution 2: Fix Widows Defender Error 0x800700AA by Using DIMS Tool

DIMS Stand for Deployment Image Servicing and Management

  1. Open the “Start” and search “cmd” (Or “Press Win key+ S and Search cmd”)
  2. Right, Click on the “Command Prompt” then “Open Run as Administrator.”
  3. Type the “following command”, and then “press Enter”.                                                              DISM.exe/Online/Cleanup-Image/RestoreHealth
  4. The repair process takes several minutes for the completion of the process
  5. After the DISM tool repairs your files, “restart your PC”.

Solution 3: Enabling Windows Defender in Safe Mode

DISM and SFC scans may haven’t fixed the issue in your case, but if they didn’t, the issue could be a conflict with one of the system files used by the built-in antivirus suite.

The same 0x800700AABA error has been encountered by some users when they start their computer in Safe Mode or launch the utility. Users managing to resolve the issue have reported rebooting the computer in Safe Mode and enabling the Security Suite for the operating system.

  1. First, Press the Win-R key to open the Run window and then type msconfig into the text field. Press the Enter key to start the program. You can also find it using the Cortana search function.
  2. Now, Choose the Boot tab and check the box next to Safe boot in the Boot options. Afterwards, click Apply and OK.
  3. Use the Restart button if you want your PC to restart at the exact same time. If you want to restart your PC manually, you can click on Exit without restart

Solution 4: Fix 0x800700AABA error by Reset Window 10 

  1. Open the “Settings” in window 10 (Or “Press Win Key + I”)
  2. Then click the “Update & Security>Recovery”
  3. Click the “Restart button” (For “Advance option”)
  4. Restart the system and select “Troubleshoot>Reset this PC”.
  5. There are two options: Keep “my files” and “Remove everything”. Select the required option.
  6. Enter your “username” and “password”, select the Windows version and “insert Windows 10 installation media.”
  7. Finally, click Reset.

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