This error can see into my channel, see video.
You can see the time of update is show us with a day older.
If you can try to update using Control Panel you will see an update in progress or show you one update for Windows Defender.
This update will send you to here.
They tell us:
Enterprise administrators can also push updates to endpoints in their network. To clear the definitions cache and trigger an update, use a batch script to run the following commands as an administrator:
… and come with this solution:
cd %ProgramFiles%\Windows Defender
MpCmdRun.exe -removedefinitions -dynamicsignatures
Another way to solve it is to try this tools, in order to fix different definition files for different products and platforms:
|Windows Defender Antivirus for Windows 10 and Windows 8.1||32-bit | 64-bit | ARM|
|Microsoft Security Essentials||32-bit | 64-bit|
|Windows Defender in Windows 7 and Windows Vista||32-bit | 64-bit|
|Microsoft Diagnostics and Recovery Toolset (DaRT)||32-bit | 64-bit|
|Forefront Server Security||32-bit | 64-bit|
|Forefront Endpoint Protection||32-bit | 64-bit|
|System Center 2012 Configuration Manager||32-bit | 64-bit|
|System Center 2012 Endpoint Protection||32-bit | 64-bit|
|Windows Intune||32-bit | 64-bit|
This is not only part of the the error.
If you read about CISCO configurations and bad errors then some bad configuration can give a bad time error for some IP packages.
The Windows OS and Windows Defender has a protected way to update and don’t try to report to correct update that will create this loop with a bad day update.