Microsoft Security Essentials Error Upon Windows Startup 0x80070002

If you are receiving an error upon windows starting up in Windows 7, Error code: 0x80070002, after trying to uninstall Microsoft Security Essentials then follow the steps below to fix it.

microsoft security client error

Use Registry Cleaner

Often the cause of the problem is in the faulty registers, which must be deleted. To do this, it is convenient to use the appropriate software like CCleaner.

  1. Download, install and start CCleaner (a free version is enough).
  2. Select the “Registry” tab. Be sure to select the registers of all available types.
    microsoft security client 0x80070002
  3. Press the “Scan for Issues” button to find broken registry keys.
    microsoft security client error code 0x80070002
  4. After that, click on “Fix selected Issues…” to clean the keys.
  5. Press “No” in dialog window.
  6. Select “Fix All Selected Issues”.
    microsoft security client error 0x80070002
  7. Restart your PC.

If this does not help, continue to the next method.

Manually Edit the Registry

In our instance, the method above doesn’t clean/fix everything and we still need to delete a certain registry entry. So go to the start menu and launch “Regedit.”

Now browse to the following location. One of the folders under the “Uninstall” folder will contain a Microsoft Security Essentials entry on the right hand side. Delete that one.

[vb]HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\Current version\Uninstall[/vb]

error 0x80070002

Reboot your computer, and hopefully the error is now gone.

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Use the Troubleshooter

This method can be used as the very first option, and in case if nothing helps. The algorithm of his work is known only to the developer, and in practice this helps only with some probability.

Select Start → Control Panel → Troubleshooting, and then follow the instructions for the kind of troubleshooting you want to do (you should to try “System and Security” and “Programs”).

microsoft security client

Cyril Kardashevsky


    1. Go into msconfig from Run Dialog box and disabled Microsoft Security Essentials from Start Up. I would recommend that you use a good third party tool for your PC Protection.

  1. I suffer from the same problem [Windows?] oh sorry, I mean the above as shown in the error picture except that this piece of MS junk does not give me the courtesy of an error code.
    So how do I go about getting rid of this abominable blow-man?

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