| All comments about MsMpEng.exe: |
 Tom | Safe, STM should update |
| Oliver Sahr | Service-Dienst von Microsoft Windows Defender (Defender soll den PC gegen Spam und Rootkits schützen) See also: Link |
| Terry | MS spyware program, not dangerous, but useless |
| Anthony Colley | Windows defender file |
| | Windows Defender |
| Mike | It is microsoft windows defender, free to download to |
| Jeremy | Windows Defender See also: Link |
| Neo | Safe. It is a resource hog when running it full scan but I usually turn the priority to idle when i notice it. |
| Bill | Windows Defender/Windows One Care See also: Link |
| | This is safe. but more resource consuming |
| | Windows Defender....if you installed it you should know.....hopefully you do....by microsoft! |
| denise | safe -use windows defender to check my system |
| | its a windows defender process |
 Nicko | Windows Defender, eats CPU usage sometimes |
| Peter | process to do with MS Defender See also: Link |
| Rubberduck | Belongs to "Microsoft Defender" (AntiSpyware-Program) Beta 2 |
| charlie | Windows Defender (anti spyware) scanning your PC for threats. |
| G.A. Taatgen jr. | this file is an update-manager. After download Microsoft wants you to restart to make updates work. When you restart problem is solved. |
| | is a process belonging to Microsoft Windows Defender Antispyware. Manufacturer: Microsoft Corp. http://www.microsoft.com/athome/security |
| Bevan Miller | There are way better anti spys around. AVGAS and SpyBotS&D. in its original form (Giant) Defender was good, now it ignores too much crap from MS advertising friends. My PC runs better without it. |
| Geetesh | As its a windows Addin product for Windows security, than it proovs that we do not have any threat from it. But negative comment is when this file starts its process it eats 50 % or more of your system speed, which alternatly slow downs other applications running on your computer, due to which your system performence comes down. |
| F. Frye | It is part of Windows Defender. You can remove it through add/remove programs or other removal tools. It is difficult to set the scan times as it appears to be random on my machine even though I set it for 2 am. |
| David V Hacker | Its the microsoft programs "windows Defender beta 2". It goes to very high levels if it doing an auto scheduled scan. |
| | Windows Defender Process |
| Beaglex2 | part of winxp defender, eats a lot of cpu but only lasts for a couple of mins |
| Marc J. Miller | Part of the Microsoft Windows Defender anti-spyware service |
| D_B_D | MS defender(antispyware beta) absolute cpu hog. |
| pszczepa | Executable is in "C:\Prog ... \Windows Defender\" |
| | Part of Ms Defender Beta. Hogs memory |
 Jim Robinson | resource hog, it causes the computer to stop and then you cannot use it for some time and it also causes continual slowdowns on the computer useless beta from microsoft. |
| | It is the process for Windows Defender. Tends to greatly bog down system resources. Can use up to 99% of your CPU, even when not running. Easy fix is to uninstall Windows Defender. |
| Hogar | Resident part of Microsoft Defender See also: Link |
| Ifrit | Not a security risk, but can turn itself effectively into malware, eating CPU resources. |
| vensgal | Not Dangerous but consumes more resources. we can try turning off Indexing Service to reduce the consumption. |
| | Windows Defender, takes a lot of resources for little work |
| Steve | Microsoft's Windows OneCare (antivirus and anti spyware) |
| Paperoga | Windows Defender |
| | CPU hogging process |
 CER | Will peg cpu, and hog I/O, may install on servers, causing difficult to find bottlenecks. |
| Ken | Windows Defender is just doing a timed system scan if MsMpEng.exe is taking alot of computer prosessing. |
| CJ | As said, it's Windows Defender... On my machine the I/O is what realy stood out to me... This program had read and written more than all other programs combined... |
 | wer Panda drauf hat braucht defender nicht! da sich dann AVENGINE.EXE mit MsMpEngine.exe "im Wege" sind. Siehe auch mal Security Taskmanager! |
| Johannes | Windows Defender |
| | Some people find it really hogs the cpu almost to the point of the computer becoming unusable. Of course that's when it scans. But it isn't dangerous. |
| Pinda! | Windows def.file |
| Gooseman | It's a process for Windows Defender Spyware program. Safe to end this process. |
| | Windows Defender |
| H55 | windows defender |
| Calbo | Windows Defender. On one machine of mine it eats up to 30% CPU time |
| ko | MS Defender component, do not end while running. If you want, uninstall Defender to solve the problem |
| Tem | Windows did not do a very good job with this one. Disabled my firewall several times |
| Jim | Windows Defender process See also: Link |
| Chuck | Is Microsoft. Also is known to consume 100% CPU at times. |
| Bob | spyware, |
| M | part of windwos defender |
 Ed | Offenbar auch ein Dienst von Windows Live OneCare |
| Ben | but it hogs up 50% of my Core Duo |
| | hotbar 4.8.4.0 |
| Henry. | Not dangerous but annying: it uses 100% of CPU for a few minutes at Windows startup .Windows Defender can be safely deleted. Use Adaware and Spybot instead. See also: Link |
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