Hello, My setup: Pentium 4 3.00 GHz, 1 GB of Ram, Windows XP. For some time now, I’ve been having a big problem with the CPU memory usage, which is causing a very high response time with every click (it's lagging, it's lagging...). When I opened the Windows Task Manager, I noticed that CPU usage was approaching 100% with explorer.exe above 50%. Even when I disconnect from the web (so no peer-to-peer...), there has been no improvement. Yet, I have invested in the memory and my hard drive is 200 GB. A program might be running behind all this, but how can I find out? Thanks in advance for your help!!! Best regards, Philippe

UC used at 100% : CCM

Réponse 1 / 122

Diams

If you haven't done anything about this one! winvnc.exe
you have someone who can take control of your COMPUTER!

To clean it, you need to stop certain services!

An active service prevents disinfection, so take down the suspicious services.
Hummm

Source Microsoft!

For Windows XP:

Type the following command (without quotes and on one line) in a command window when the countdown dialog box appears: "shutdown.exe –a". This will cancel the initiated reboot. Note that this technique only applies to Windows XP. Then:

Step 1: Isolate the computer from the Internet
To do this, you can for example unplug the modem or the network cable to disconnect the computer from the Internet

Step 2: Stop the processes used by the worm
Click Start, Run
Type taskmgr.exe, then confirm
Select the Processes tab
End the following processes:
*_up.exe
avserv*.exe
skynetave.exe
hkey.exe
msiwin84.exe
wmiprvsw.exe
Note: If the computer fails to boot properly, start in safe mode. To do this:

Restart your computer and start pressing the F8 key on your keyboard. On a computer configured to boot under multiple operating systems, you can press the F8 key when the boot menu appears.
When the Windows Advanced Options menu appears, select an option, then press ENTER.
When the boot menu appears again, with the words "Safe Mode" written in blue at the bottom of the screen, select the installation you want to start, then press ENTER.

Good luck...

Philippe

Hi Diams,
Thanks for your help!!!
Regarding winvnc.exe, it's my brother, the network administrator... but he's currently unavailable (on vacation abroad) who installed it for me to be able to help me remotely when things get stuck.... (and that happens!!!)
I printed your email and I'm going to try to follow the "Microsoft for Windows XP" procedure.
I'll keep you posted!!!
Best regards
Phil

Antoine

Hello, I had the same problem after upgrading from XP to Windows 7: CPU usage always between 50 and 100%, plus the fan was running almost constantly. The problem was resolved by updating my graphics card. I identified my graphics card with a free software called "SIWPortable", and then downloaded the update from the AMD website.
Best regards

apache 974

Thank you very much, my UC went from 100 to 40 in 1 second
thanks again

Réponse 2 / 122

homelaet

Hello everyone,

Having gone through all the topics on this subject, I hadn't yet found out how to fix this problem.
But I finally managed to do it in an extremely simple way.

So the symptoms:
- the fan that kicks in very quickly after opening Windows when no program or hardly any is open
- this mainly happens in video mode.

Everything you might have found online:
- graphics card issue that's about to give up (don’t worry, that’s not it)
- using scans to see the problems with your PC
- regcleaner to use (note that it can't hurt their PCs)
- dust inside your PC (which is dangerous to open if your PC is under warranty. If you open it, your warranty is void)
- a virus
- a trojan

How I fixed this problem:
Even beginners (like me) can do it -> start -> run
-> ms config
-> uncheck all programs. (know that these programs are not related to Windows, so your PC will still start without any problems. Just make sure your antivirus, firewall, and your WiFi are still checked if you're on WiFi)
-> apply
-> close
-> restart your PC

The program that was blocking your PC is inside.

As soon as the PC has restarted, the fan will stop as soon as the Windows loading screen appears.

A window will pop up to notify you that you have modified the startup settings. Click on "don't show this page at startup anymore" and OK

I had this problem, and since I performed this action (4 hours ago) I've had a normal PC back, with no loud fan and no internet slowness

Your problem is solved.

You can thank me now :)

Cilka

Thank you! Thanks to this post, my PC has regained its former youth :) :) :)

music.cha

Me when I run "ms config", it doesn't work... (I’m on Windows XP): is that normal?

Reaverman

@music.cha: original post issue, there are no spaces in the command names! type "msconfig" (without quotes) and everything will work fine...

Gart

and for Vista, what’s the process? ^^'

bu61 Posted messages 607 Registration date Status Membre Last intervention 57

It's the same, start-accessories-run, you type msconfig and go to startup, and uncheck what is unnecessary, you can also go to services but remember to check "hide Microsoft services".

Réponse 3 / 122

Pluto

No, it also works under 2000.
In my case, each open software takes the CPU to 100% in turn: one time it's IE, another time it's Emule or Kerio... what a laugh! And yet, I just formatted everything and installed it with great care. I'm seriously considering getting a Mac.

Réponse 4 / 122

seumeneur Posted messages 1 Status Membre 2

Yes, I had the same problem, a process called was running but I don't remember exactly the name but I'm sure it had 'net' in it.

Réponse 5 / 122

tahiti bob

Look in your tasks for a fake Norton antivirus. I can't remember if it has "protect" or "fvprotect" in the name. Otherwise, eliminate by turning off the mule, check the permissions you've granted to programs to access the internet.

In XP, there are file indexing services that can run nonstop

Attack!

But still, it's strange though.

Réponse 6 / 122

Krokmiten

The best antivirus is... man ;-)
In your case, don’t just look at the name but at the CPU usage. Kill the annoying process and then you’ll see later if it was a virus, in which case the PC will work perfectly afterward. Then you'll need to search for it on the disk and delete it. After that, restrict the communication ports to what is necessary via the firewall, 80 for http, etc. For P2P, opening the ports is at your own risk.

Moi

Thank you, I deleted a few processes and poof... 0-1%... I don’t remember which one it was, but next time I do it, I’ll take a look! Thanks again..

Réponse 7 / 122

bernie61

Hi
try this fix here
http://securityresponse.symantec.com/avcenter/venc/data/w32.korgo.f.removal.tool.html
Cheers

Réponse 8 / 122

Diams

An unstable program can cause this kind of trouble.

But in your case, I lean towards SASSER!

The VIRUS

Check out the site http://www.secuser.com
And update your WINXP quickly.
Look at your processes, you will probably see a lsass.exe in action.

See you +++

Eric

You have the right to use safe mode :)

Philippe

First of all, thanks to everyone who is helping me solve the problem!!!
Diams, I think you are close to the cause of this 100% CPU usage.
My WinXP is up to date, Norton hasn't detected anything, but following your advice, I went to secuser.com which found a nasty BAT SASSER.A.
However, FX Sasser, the fix found on secuser.com, detected nothing...
And as you suspected, I have an lsass.exe present in my processes. I couldn't delete this file (?), located in Windows\system32, manually: "Access denied."
So, what should I do?
For your information, here is the list of processes present on my PC; maybe there are some intruders!!!
realsched.exe emule.exe (uh, it's not him...)
taskmgr.exe explorer.exe VPTray.exe mHotkey.exe
WinCinemaMgr.exe SchSvr.exe DitExp.exe FastTVSync.exe
winvnc.exe nvsvc32.exe rundll.exe Dit.exe Rtvscan.exe
LogWatNT.exe DefWatch.exe alg.exe spoolsv.exe
svchost.exe (present 4 times) IEXPLORE.EXE slsk.exe
lass.exe services.exe winlogon.exe csrss.exe smss.exe
X10nets.exe winampa.exe WinKA.exe WinUpdt.exe
System Idle Process
Thanks in advance!!!
Phil

Azara

Excuse me, but I have in my task manager Issas.exe (SYSTEM) is it a virus?

ghost

Issas.exe is not a virus.

Réponse 9 / 122

lionel

Thank you very much for the answer. In retrospect, I don't think it's a virus; it doesn't bother me at all. In fact, curiously, I switched to a new version of the mule (morph), and going back to an earlier version gives me resources again (strange, strange). Thanks again. ++

Réponse 10 / 122

lionel

Except for the respect I owe you, my 100% CPU issue has been resolved.
It is said on this site that lsass.exe is not necessarily the virus, it is simply a sensitive file that can be infected. I'm not going to just delete anything and everything.
Now another question, stopping a process is not one-way, right?

Diams

Well done!

I don't encourage anyone to have two active antivirus programs! Lol

Well, if you've taken a look at www.secuser.com
and tested by Trend Micro, I think you're fine (YOUR PC) Lol

It's possible that some programs indeed drag their feet and weigh a ton for a PC; I've already seen a DOC process (Emulation) have this effect for 7 hours and 30 minutes on a machine.

Finally, I think this CCM is cool

It's a good foundation for learning together.

See you later

Eric

williams > Diams

Merci pour toi, ce site est génial.

Réponse 11 / 122

Philippe

Hum hum,
I am closely following the discussions hoping to find a solution to my problem.
This afternoon, I unplugged my Freebox, did 3 consecutive defrags, activated some "anti-sasser" found on secuser.com (nothing).
Then I reconnected it, ran Ad Aware (nothing)... and here we go again: the CPU usage goes up to 100%!!!!
The most resource-intensive process is explorer.exe at 50% (then System at 32%) and when I end it, well the computer "shuts down" too.
Honestly, I don't know what to do anymore...
And in the meantime, the PC is lagging...
Thank you for your help!!!
Phil

Réponse 12 / 122

Tucko la banana

Ok Ok...

Well, first of all, hello everyone,
After reading with a lot of patience all the posts related to 100% CPU usage (which is my case...). I tried the various methods given like: Sasser (it's useless, yeah...), multiple antivirus (I have one 'Panda Platinum'), I logged out and cleaned my task manager, but that didn't help at all... It's depressing, isn't it...

Anyway, besides that, I wanted to ask you something... On average, how many tasks do you have running in your task manager...?
I have at least 25 and... Well, I don't understand where they come from...
So I'm sitting here with a butcher knife in front of my CPU and I'm threatening it with a nasty formatting, but I still like it...
So, if someone can shed some light on this for me... I would thank them with a nice thank you lol...

Alright, bye.

Tucko el Tuckizador

Philippe

Hi La Banane,
... I’ve sheathed the knife.
I started this discussion on "the CPU at 100%", received (very kindly, by the way, some attempts at solutions)
Nothing has worked: antivirus, adding keys in the registry, etc...
My brother, who is in charge of a computer network and just came back from vacation, had just one word (ahhhhh): reformatting...
In summary and briefly, when the problem persists without an apparent virus, explorer.exe (which mainly drains my memory and is certainly where the problem comes from) is covered with successive “layers” that “trap” the program(s) responsible for the 100%.
Hence the ineffectiveness of the prescribed remedies that cannot address the root of the problem.
There you go, tomorrow night I’ll reformat my 165 GB used (...) and I’ll be very suspicious before installing certain programs...
Best regards
Phil

Réponse 13 / 122

darkful

Hi, I don't actually think it's a virus, I've had this problem too. However, I had a firewall and an antivirus. I just had to uninstall the firewall and avoid going to sensitive sites.

As for the lsass process, I don't think it's what we think. Because even though it's loaded, it's not working (inactive process) I think it's still a flaw in Windows XP in battle with the web.

Réponse 14 / 122

TotoRhino Posted messages 2 Status Membre 1

Hi,

Thank you for your reply bernie61, but I had already installed FixKorgo, without success.

However, I got my answer thanks to the forum:
As announced, I went to the site http://www.secuser.com and I started the online antivirus testing procedure.
And there, where no software found anything, Secuser did: 5 files infected with KORGO.AB!
To know more, I checked the files in question, since Secuser provides the paths of the files, and I tested each file with Avast. None were detected as infected!
I’m disappointed, I will inform the Avast site, if it can help improve their program...
I then started my computer in safe mode command line, as the files were obviously used by the system (go figure!) and could not be deleted under Windows.
After deleting the infected files, everything works wonderfully!

Thanks to this very informative forum!

See you later!

Réponse 15 / 122

Franck

Hello everyone,

To add a bit of salt to the discussion, it may also be the case that the CPU issues are solely due to XP and its multiple preview functions: the preview function for DivX and others... if you open a folder with a lot of movies, it can hog the entire CPU trying to check the films and generate a preview of the one you clicked on...
Try the method described by a stranger here:
http://www.sur-la-toile.com/viewTopic_1382_5_Explorer.exe-tr%E8s-gourmand-en-CPU.html
(Sent on 13-09-2004 at 09:01 ).

This should help... Best regards.

step

Hello, good evening,

regarding the 100% CPU issue caused by an XP bug,

I solved the problem thanks to the link from this unknown person to whom I would love to give flowers, but who left without leaving an address. And thanks also to this other unknown person who provided the link, to whom I would also like to offer a flower, but...

well done. Hats off.

and thank you.

Réponse 16 / 122

cathylolo

Hello everyone,
I had the same problem not long ago. In my case,
they were AVI files that remained active after closing.
Impossible to delete them.
The only solution: Start in "SAFE MODE" and then I was able to delete them.
Maybe another solution: open these files with something other than
a compatible player, then the system makes the file inactive and you might be able to delete your file(s). (untested solution)

Good luck!

cs

Hello,

I have exactly the same problem, with a poor .avi file that cannot be deleted because it's supposedly already in use, even when nothing is running.
As a result, my entire CPU is being used, and I've been getting frustrated trying to figure out the cause and rebooting my PC for 2 days.
Can you remind me how to enter safe mode so I can finally get rid of this big mess!!??
Thanks in advance

cs

cs

Hello again,

I had the same problem as cathylolo with an avi file, the CPU was almost 100% occupied as soon as I left the folder open on the desktop.
I tested all the antivirus and firewalls, and there was no problem, nothing!!
I couldn't delete it even in safe mode.
But I have the solution: make the folder it’s in exceed a few GB (bigger than the size of your recycle bin) and then delete this folder (don’t forget to make copies of the files that work and that you want to keep!!)
Since the folder is too big, it won't stay in the recycle bin and the computer will then ask you if you want to DELETE EVERYTHING, and you click yes, and boom!! The file disappears with the rest!!
In short, I finally got rid of that crappy file and my CPU is no longer limited in capacity!!
Cécile

Réponse 17 / 122

Starsku

I also have this type of problem in 2 cases:

- DVD playback (regardless of the program used to play them). The CPU usage shoots up to 100% and the movie stutters. In the task manager, it’s always the program used to play the DVD that consumes the CPU (and not another process).

- when I use Babylon Pro 5 (which wasn't an issue before) that is a fairly light program, supposed to run in the background.

Other than these two programs, I have no problems ...

After reading all the messages (because I've read them all) I conclude this:
- the only people who have resolved their problem are those who formatted
- viruses, spywares, and other adwares are not at all the cause (it’s a bit easy to always blame everything on that).

So it seems to be a software issue but which one??? Windows XP that bugs for I don’t know what reasons or the programs being used???

Don’t let this discussion die ... This problem bothers a lot of people and as far as I know, no convincing solution has been found.

Bring on your brainpower

PS: don’t forget that when you find the solution, it is welcome on the forum (which still exists even when you no longer have a problem)

Fayne

Hello,

I’ve also been having this problem for 5 days; I’m trying everything I can read on this site, but nothing works.

I have an LG X110 with XP, and I have only limited knowledge of computers.

I can't format my PC, and I would like to know if anyone has found a solution?? (the discussion dates back to 2004...)

CCleaner, defrag, http://www.secuser.com/ I even tried modifying the registry... But nothing works, my CPU is still at 100%.

Being in Greece for 6 months, I need to find a solution other than formatting; does anyone have a simple solution????

Réponse 18 / 122

jojoleroi

Hi, it's a WIN XP bug. It comes from the fact that Windows scans the information of the files you are going to view. You need to remove a key in regedit.

[quote]I'm offering you the solution because I've been through this and it is indeed a pre-viewing issue handled internally by Windows Explorer. Here's what to do:
1°) Disable the auto preview feature for DivX in WinXP:
Start - Run -> regsvr32 -u shmedia.dll then OK and there you go.
2°) Finish with the DivX problem, it's a known thing in Windows XP, you need to delete a key in the registry:
Start - Run -> regedit then OK
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{87D62D94-71B3-4b9a-9489-5FE6850DC73E}
delete the key "InProcServer32" right-click then "Delete".
Now you won’t have any more issues with 100% CPU usage and DivX files that you can't delete.
See you.[/quote]

There you go, it was almost too easy :p

Réponse 19 / 122

lionel

Hello everyone, I'm also affected by the issue of 100% CPU usage.
I found a process in the Windows Task Manager called lsass.exe, is it the Sasser virus? Are you sure about that?
Thank you in advance. lio

Diams

You have SASSER, it's absolutely CERTAIN!

If you think man is clever, don't underestimate a virus!

It even uses your machine to infect others!

NICE for the mates, right???

So act, THANK YOU

Eric

Graal

Hello everyone,
lsass.exe IS NOT Sasser but a process used for logging in. However, it is true that Sasser spreads through a vulnerability in lsass.
(A friend got scared when he came across Diams' message :)

Bobo > Graal

Do not confuse the lsass.exe process and the isass.exe process. The former is okay (System), the latter is a worm. I confirm Graal's statement.

tsix

I think the virus here is the forum. If you manage to delete Isass.exe, you will definitely have problems.

Réponse 20 / 122

TotoRhino Posted messages 2 Status Membre 1

Hi,

I have the same problem. My CPU is mostly at 100% usage, with Explorer.exe being the most resource-hungry.
Actually, I just formatted my drive after changing the motherboard. A bit too rushed, I surfed without protection for a few moments.
Avast detected the Korgo-V virus.
Despite an eradication and applying the patch, the problem persists.
If I open the task manager, end Explorer and restart it, I can't access the task manager anymore; its icon stays visible in the systray, but the task manager window cannot be opened.
If I want to restart the PC then, I have to turn it off by cutting the power.
I’ve been going in circles for a few days. Tonight, I will test the website http://www.secuser.com, we’ll see.
Otherwise, before undertaking another formatting, I'll try the SP2 experience.
But if anyone has ideas...

See you soon.

destouches

For the UC at 100%, you need to have the Torvil version B, which is placed in the Windows system in three copies. Try to delete it with Sophos.

UC used at 100%

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