Failure to Update

[Guest]

Windows Update keeps offering update to Windows Defender signature
1.17.2437.5. It downloads and then fails to install.

If I try to manually check for updates from Defender, it also tells me it
can't install the updates, failing with error 0x80070643.

Any ideas?

Thanks

 

[Guest]

Windows Update keeps offering update to Windows Defender signature
1.17.2437.5. It downloads and then fails to install.

If I try to manually check for updates from Defender, it also tells me it
can't install the updates, failing with error 0x80070643.

Any ideas?

Thanks

Wigster,

Check out this link. Hopefully, you will find a solution.

http://search.microsoft.com/results.aspx?mkt=en-US&setlang=en-US&q=0x80070643