Hello Diana,
That error code: 0x80072efd. indicates a failure to connect to the update
servers and is addressed in this KB.
http://support.microsoft.com/?scid=kb;en-us;836941
That code usually indicates a firewall preventing access.
Are you on a managed, corporate or institutional network? If not, do you
have a firewall that controls outbound access by apps on your machine?
--.
"Diana" wrote:
> Hi,
> Ever since yesterday, Windows Defender says it needs to update and when I
> let it update it says there was an error and it was unable to update the
> definitions and gives me error code 0x80072efd. I tried to fix it with the
> recommendations that I found for XP but I guess its not the same. Can anyone
> tell me how I can fix it?
> Thanks