MSE won't install

I get error code: 0x80070643

This all started because I got a peice of malware. After some work with Malware bytes I was able to remove the software. Since then I've removed Malware bytes.
I tried to reinstall MSE and got the "already installed" error. So I tried removing any other Antimalware/anti-virus I've known that's ever been installed.

I've tried removing any registry references to MSE.

I've tried all the steps at:

I've tried this, though it appears certain steps cause errors:

Question Info

Last updated May 16, 2018 Views 2,414 Applies to:
I got "system care" fake anitvirus software which disabled all downloads and MSE for a while.

Macaffree, the afore mentioned Malware bytes and MSE were all installed per the Microsoft list of removal tools.

"Microsoft list of removal tools" is what? Guides for removal of this malware exist, but none would recommend installing MSE or McAfee to remove it and none would be published by Microsoft.


If you intend to install MSE, you need to remove McAfee completely from your system.


You should never have more than one security product installed on the PC providing active protection/scanning. This can cause performance issues, system instability, and can hinder the effectiveness of both products at providing protection.

Windows Insider MVP (Security), Moderator Microsoft Community

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