What is MsMpEng.exe please?

  holme 22:13 11 Aug 2007
Locked

The hard disc occasionally starts thrashing of its own accord and, under Processes, "MsMpEng.exe" eats up to 45% processor power.

It's a System process. Any ideas what it is and what it's doing please? The other, er, 55% is System Idle Process. TIA.

  holme 22:19 11 Aug 2007

Sorry, forgot to mention that Defender's automatic scan option is UNticked.

  Al94 22:22 11 Aug 2007

Google is your friend click here

  holme 09:14 12 Aug 2007

Thanks, but tried that first before posting this query.

Have also tried uninstalling Defender and re-installing a brand-new download.

The problem is: If the Defender daily auto-scan feature is UNticked (confirmed), why does the machine seemingly still run MsMpEng.exe?

Also at a time which is well after start-up (typically more than 1 hour) and in any event not related to the default time set under Defender (02:00). But that's UNticked anyway...

Clearly we're not the only ones getting this hiccup, the Microsoft site has long threads about it.

  birdface 09:52 12 Aug 2007

I would wait until Microsoft Up-dates on Tuesday before you do anything drastic,It looks like a problem with Defender and Windows live One care,As Microsoft know all about it I would imagine that a fix would come shortly.

  holme 10:27 12 Aug 2007

Hokay, thanks for that.

This thread is now locked and can not be replied to.

Elsewhere on IDG sites

Alienware 17 R4 2017 review

These brilliant Lego posters show just what children's imaginations are capable of

Mac power user tips and hidden tricks

Comment réinitialiser votre PC, ordinateur portable ou tablette Windows ?