• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

Windows Defender Issue

I recently reinstalled 8.1x64 fresh and decided to use Windows own firewall and Windows Defender instead of the 3rd party tools I'd used for years. So far it has worked out, much easier to setup & maintain.

All was fine with Windows Defender until recently with regard to updating definitions via WD itself. I have no idea what the issue is but WD simply quit updating... I open WD, click the Update tab, click the Update button to the right -- nothing, it searches and then nothing. No error message. I updated WD every day via the app since April when I reinstalled. I have no idea what's changed. I will admit I no longer use MU/WU, I'm settled on using 8.1 as is until either I switch to 10, Linux, Apple... I guess my system is possibly missing an update WD needs, not sure? Nothing has changed with the running services, I haven't disabled anything.

What has worked is the offline definitions updater - mpam.fe.exe, whatever the name. I've used it once and it updated WD to the stated versions according to the change log.

Interestingly, if I have the correct log file (mpcmdrun.log), ever since this has happened (about 10 days ago), even after 3 or 4 days without an update the log says "no updates needed"...
MpCmdRun: Command Line: "C:\Program Files\Windows Defender\MpCmdRun.exe" SignaturesUpdateService -UnmanagedUpdate
Start Time: ‎Mon ‎Jul ‎15 ‎2019 05:40:47

Start: Signatures Update Service
Update Started
Search Started (MU/WU update) (Path: Microsoft - Official Home Page)...
Search Completed
Update completed succesfully. no updates needed
End: Signatures Update Service
MpCmdRun: End Time: ‎Mon ‎Jul ‎15 ‎2019 05:40:50
Finally, I also noticed after using the offline definitions update there's a Network Inspection System Engine & Definition listed in the About dialog of WD...


Any Ideas?

My Computer

System One

  • OS
    Windows 8.1 x64
    Computer type
    System Manufacturer/Model
    Lenovo G50-45
    AMD A6-6310
    Monitor(s) Displays
    15" Laptop Display, 32" Samsung HDTV
    Internet Speed

Users Who Are Viewing This Thread (Users: 0, Guests: 1)