microsoft security essentials

i cannot unnistall microsoft security essentials. keep getting error code 0x80070643. i am trying to install a different antivirus?malware program. currently have no protection, help!!
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i cannot unnistall microsoft security essentials. keep getting error code 0x80070643. i am trying to install a different antivirus?malware program. currently have no protection, help!!

Is this the same computer as in https://answers.microsoft.com/en-us/windows/forum/windows_other-performance/windows-could-not-start-repair-process-or-start/b0f7539f-aee6-43b3-aa07-9c11cb3f782f ? The Windows Defender anti-spyware program that was pre-installed on Windows Vista has probably been disabled now that Vista is no longer supported.  I know it’s turned off on my Vista. 

If you have not done so please review https://support.microsoft.com/en-us/help/22882

Ref MSE Uninstall…

You should be able to remove MSE from Control Panel.  Any problems uninstalling see: Uninstalling Microsoft Security Essentials

Recommend you restart the computer to ensure the uninstall is complete.    

Did you try Revo?  You advised it worked when you needed to uninstall MSE in 2016.  https://answers.microsoft.com/en-us/protect/forum/mse-protect_updating/error-code-for-update-issues-with-microsoft/ea5cc353-b3be-42a5-8355-6d0b0cb17f86

Not sure how many of these still support Vista so you'll need to "investigate" before installing any AV on a Vista computer: 

http://windows.microsoft.com/en-US/windows/antivirus-partners#AVtabs=vista

Choosing an Anti-Virus Program

Regards…

http://blog.emsisoft.com/2015/01/27/top-10-ways-pups-sneak-onto-your-computer-and-how-to-avoid-them/

MVP Consumer Security 2014-2016
Windows Insider MVP 2016-2018

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Last updated August 1, 2018 Views 3,571 Applies to: