Problems updating microsoft security essentials
Cause 1: You might have another Antivirus programs installed while you are installing MSE.
Solution 1: Uninstall all the other Antivirus programs before installing MSE and try again, this should resolve the 0x80070643 error.
You might want to change the startup type to automatic.
If you aren’t sure how to deal with services, you might want to read up a similar post on starting a Windows service and turning it on automatically.
For that, we do not execute This time, I’ll ship the whole thing, the updater script and also the necessary binary programs and libraries.
The corresponding licenses are referenced within the script source code itself. One word of warning though: No longer updating the AV engine poses its own security risk, just remember [CVE-2017-0290]!
Even more problematic was the fact that manual updates wouldn’t work anymore either.
The following Microsoft KB article applies to Windows XP, Vista and Windows 7 both 32bit and 64bit editions.
With no error messages to be found anywhere, I had no idea what to do.
Ok, on XP x64, MSSE was never supported to begin with (the last 64-bit version 4.4.304.0 for Vista works though), but the problem also showed up on supported systems, maybe because of their Eo L status.
So, updates are really important right now, or the security tool you may rely upon to protect you at least a little bit may become the most dangerous thing on your old XP x64, Pos Ready2009 XP or Vista box, and not just there but on more modern systems as well (The Windows Defender on Windows 7 uses the same MMPE).
What I did was to download the full update pack from Microsoft [here], and install it manually. Based on that, I wrote a very simple little batch script, that automates the process.
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This makes the entire update process unusable since 2018-04-20.