What is System idle ? Is System idle spyware or a virus?

How to fix System idle related problems?
1. Run Security Task Manager to check your System idle process
2. Run Registry Booster to fix System idle related errors
3. Run Spyware Doctor to remove persistent malware

Process name:
Product: System idle or Windows
Company: Microsoft
File: System idle

If you want a detailed security rating about your System idle (and all other running background processes) read the following user opinions, and download the free trial version of Security Task Manager.

Note: Any malware can be named anything - so you should check where the files of the running processes are located on your disk. If a "non-Microsoft" .exe file is located in the C:\Windows or C:\Windows\System32 folder, then there is a high risk for a virus, spyware, trojan or worm infection! Check it out!

Users Opinions

4018 users ask for this file. 5 users didn't rate it ("don't know"). 65 users rated it as not dangerous. 7 users rated it as neutral. 6 users rated it as little bit dangerous. 9 users rated it as dangerous.

All comments about System idle :
Internal Windows idle process
internal windows system process
Vampire Das ist der Leerlaufprozess  See also: Link
Heiko Sometimes this process seems to send on port X, because the process (sended on port X) was just closed.
Aaron Completely Normal
Silentium Scheint dafür zuständig zu sein, der CPU Leerlaufaufgaben zuzuweisen, wenn es nichts anderes für sie zu tun gibt.
ralf Ich weiß ja nicht aber bei mir hat dieser Prozess daten über port 80 an eine ip geschickt. Habe es beendet daraufhin hat er nichts mehr gesendet. Sehr sehr merkwürdig!!
It's the process memory that you have free to be used
lOnDoN bRidGe :þ Simply an auto-process used to mesure the CPU Idle (100% minus the sum of all tasks cpu usage ). It is useful to trigger low-priority processes or activity planned when user is not at the PC. Being Part of the kernel it's not based on any file nor it can be infected.
Lore Completely harmless
Nico Its a Keylogger
Un automo'vil-proceso utilizó simplemente al mesure la marcha lenta de la CPU (el 100% menos la suma de todo el uso de la CPU de las tareas). Es útil accionar procesos de la bajo-prioridad o la actividad planeó cuando el usuario no está en la PC que es parte del núcleo que no se basa en ningún archivo ni puede ser infectada.
Kurt Lane It is the CPU Usage % Remaining while other processes are running, If other processes like synTPEnh are using 100% of machine CPU it wont be displayed. I removed synTPEnh (touchpad system tray icon) from msconfig (Start - run - type: msconfig - startup tab) and it freed up my cpu buy 99%
girlsrus21 Whenever you look at something the system idle process kicks in. It shows your comp is working properly & is no threat what so ever!
Measures Idle process
geoffo It stops all other processes and the pc dosn't respond
Cedric An Auto Process that indicates resources (Memory) availablity.
CPU Idler
Sharon It monitors how much of your CPU is available
Juan this file is annoying but its harmless
brook it stops ur cpu and makes ur computer stops working in the case of shared users
jovi verschickt vieles über port 80, lasse die firewall das ganze blocken, funktioniert trotzdem alles wie es soll.
john20 When a computer is Idle it will have a high System Idle process under the CPU often in the 90's. This is completely normal for a computer as it waits for something to do. If you leave the Task Manager open a program you sill notice that the System Idle process decreases its CPU usage. It will be high when you are doing something little, browsing a simple webiste. When your doing something with more CPU, like downloading music, running JAVA it will take some CPU off "idle" and use it for another program" there must always be 100% CPU running.
Loris Its a normal process that make an unusefull infinite cycle to mantein the syncronization of internal CPU core
william jara it's the cpu % remaining  See also: Link
Leif ronnback Do not disable this! It's just doing it's job...  See also: Link
Musab that shows what the cpu is actualy NOT doing, means the more u open applications the less it will go
therearesomerealbastardsherebuti'mnotoneofthem System Idle Process : An option in the Windows XP Task Manager that indicates what percentage of time the CPU is currently doing nothing but waiting for work. If no applications are running that the user is aware of (although there may always be some tasks running in the background), the percentage can be in the high 90s.
Christopher Verlo System Idle Process is the mechanism that makes "multiprocessing" computing possible. You see, the way computers were designed, it was necessary to create a "Master" process, from which all others would be descended. This is also known as a Kernel Process, or PID 0. It is the first thing the computer loads, and if it doesn't exist, then when the process currently occupying the processor ends, the computer stalls forever because the cpu is waiting for a program to run. In the old days this was fine (one program ended when the cards ran out; when that happens you put in a new stack of cards)  See also: Link
Face Windows reqires this to run, its nothing more than a counter monitoring the "idle" bandwith of the processer. geoffo obviously doesn't have any PC knowlege...
Bob Well I believe that it is obviously spyware.
Goatse It is a backdoor into your most private parts  See also: Link
dave why does it use all my processing power and also it uses my internet connection making it difficult to browse the www this needs looked at ?
shows processor usage, does not let processor to get hot by giving it a vorthless job - do nothing
Centurion It's connected to the IP adress from the lan; port 1854.
Adam This Process goes though and cleans up you system. It is completely harmless. If you have your computer on for a while it may kick in to free up some memory or something of sorts. Note: It doesn't just tell you how much is free. It is actually doing something.
Church It's just a hassle, not dangerous.
Standard system psudeo-process that does nothing
MONGO Honestly, from what I read on other forums, u people are absolutely right. However, the strange thing is that my SIP never used to use so much of my CPU. I admit that I tinkered with my PC a bit, so I'll have to solve that on my own. My point is that my SIP NEVER used to have such a high process. I used to be able to have my PC sit with task manager open and my CPU percentage would be 0%.
Ram Prasad it shows remaining Percentage of CPU
gusangus the more cpu this uses the less the pics using. IDLE means not moving or not using. so system not being used means theres is more memory on the pc. if it is higher, the pc has more memory. the less it is the more u are using your pc.
Eddy Leerlaufprozeß, muss wohl sein, ist in jedem Win Software
Jamie McGlynn Although it is unstoppable in any way, it does absolutely no harm what so ever, probably just to show CPU availability.
b20 Takes 16 K of memory (extreamly good) and is part of every computer. Without this, you're screwed.
Don't disable this process...it's not harming your computer or anything...it reads 99% when your computer or internet isn't being browsed
Terry this figure represents how much cpu time has not even been requested by anything you are currently working with  See also: Link
Ethan Shows what the processor is not doing. or CPU available.
lucky01 Master" process, from which all others would be descended. This is also known as a Kernel Process, or PID 0. It is the first thing the computer loads, and if it doesn't exist, then when the process currently occupying the processor ends, the computer stalls forever because the cpu is waiting for a program to run
just read the first post on the link  See also: Link
friend of john? clean up, make more space, delete all folders, files, cookies. Disable system restore click apply, then restart the system, enable system restore. Now your computer must be clean, check windows task manager.(CLEAN)
It's like folding at home. It's microsoft's distributed client to find the answer of 0 divided by 0
Asher windows signed
Eden If you open task manager (Ctrl + Alt + Del) if you are an xp user. Once open click on the performance tab at the top of the window . Here you see your cpu usage displayed, if you double left click on the green meter it will switch to a better view. depending on what applications you have running i would usually expect to see the cpu below 10% when you are not doing alot.
It's a windows process. I tried closing it down and then my computer didnt work. I just restarted and it went back to normal. You should only have one process named system idle process under task manager - if you have more, run a search in your computer for system idle process and delete anything not in system32!
Rob idle prosess for cpu
Nacho El Proceso Inactivo del Sistema, no es precisamente un proceso, sino más bien un contador, el cual indica qué porcentaje del uso del procesador NO está siendo usado. Mientras no haya muchos programas abiertos no debería bajar del 80%. Si el porcentaje es muy bajo habría que preocuparse.
B-rad Essential to XP's correct operation
01chan If CPU usage is low and SIP is high than it is "1 not dangerous" as SIP does measure the idle. However, if both CPU usage and SIP are very high than SIP is "5 dangerous" since the machine should not be very idle and very used at the same time. Without proper context, I'll give SIP a "3 neutral".
Mr. 31337 It runs background processes like services, defragmenting, and basic devices. It also manages energy of ur cpu. When it is at 99% that is how much it frees up to cool down or reserve to save energy. If it is at 99% u have 1% cpu processing power, but if u increase the cpu need it will un-reserve the parts and its cpu "useage" will drop...
Cant disable this anyways
Germ bag It uses CPU once you start to use certain programs
Cole This just tells you how much memory or how much computer usage that is free. If it is running at lets say 95 Mem Usage. Then you have programs that are using 5 or your computers memory usage. This is not harmful
Joseph System Idle Process only monitors the percentage of processor not being used by any other program.. It is not dangerous.. If it shows 70% under "CPU" that means you have 70% of your processor not being used by some other program..
Hapciu Harmless process which is needed by Microsoft Windows XP to be able to have the multiprocessing ability for computing
Connor Where Windows OS puts idle CPU power
David Morris the problem I have with it is that you cannot assign it a lower priority but right clicking on it as you do the other processes, if it were only a measurer then you should be able to assign it a low priority because it is would be nothing more than a system measurer. Since you cannot change its priortiy it seems very fishy to me.
Mark Default Windows Process. Will appear to be using high percentage of CPU time when system is idle.
Wesley Resource Hog that interferes with foreground applications
Train it show system idle
Dhaval Bhatt this is a internal counter not a process. it indicate that during cetain time how many time your cpu is ideal can not kill

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More process information

Is System idle spyware or a virus, trojans, adware or worm? Is there a known System idle error?

Other Processes

System idle [all processes]