High CPU Usage MSE

[LM2008]

When i'm moving a file between a flash drive and laptop hard drive or vice-versa, the Microsoft Security Essential service MsMpEng.exe usage goes to 100% and the transfer of files seems to slowdown because of that and is really annoying.


Security Essentials Version: 2.1.1116.0
Antimalware Client Version: 3.0.8402.0
Engine Version: 1.1.8001.0

tried uninstalling it and installing again, but no luck.

Full scanned for viruses, but it came clean.

 

[OldMX]

Its a common MSE issue, the high cpu usage,. the problem is your single core processor no up to the task of the antivirus real time scanner.

 

[LM2008]

So there is no workaround? it was working fine sometime ago, but now is horrible. I thought was some engine update or definition, but i installed it again from zero without a clue. I know MsMpEng.exe is the culprit of slowing transfer speed becausei disable the "real time scan" tab and speed went to normal.

 

[Qdos]

That may be why, on the settings tab, you can specify CPU usage to whatever percentage you want to...

 

[LM2008]

But that tab is for scheduled scan and i don't use scheduled, i use manual and the default real-time. I tried a temporary solution by excluding the drive letter of the usb pen drive (G:\ in my case) from any MSE scan and now is fixed it seems and for now.