Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.

Windows 7: CPU stuck @ 100% unless task manager is open

23 Dec 2012   #1

windows 7 ultimate 64 bit
CPU stuck @ 100% unless task manager is open

I'm not sure why, but my CPU has been stuck at 100% load all the time for the past couple of weeks. I have a core temp gadget running to monitor it, and have been trying to figure out what happened. I have uninstalled all games and apps that were installed since the problem occurred, eliminated all unnecessary processes, ran avast, malwarebytes, ccleaner, and spyware S&D. I started getting nvidia driver crashes as, so i updated those and am still getting them.

My system idle process was running pretty high. It was showing 98% system usage in task manager, and the cpu usage will show in the 50's. It has recently started happening that all 4 cores on my cpu are stuck at 100% unless the task manager is opened. As soon as it opens, that cores all drop down to 1-5%. The main reason I'm concerned about it, is the temperatures of the cores. Normal temps are high 20's to low 30's. But without task manager opened, the temps are up in the 50's. I'm trying to avoid having to wipe and start over, but if it'll save my cpu from baking I'll have to. Any ideas?

Win 7 Ultimate 64 bit
Gigabyte z68ma-d2h-b3
8gb 1600mhz
gtx 460
Xonar Essence STX
Samsung 830 256gb (os & games)
Seagate 2tb (media & storage)

My System SpecsSystem Spec

23 Dec 2012   #2

Win 7 Pro x64 SP1, Win 7 Ult x86 SP1

Hello meeklo062704 and Welcome to Seven Forums,

Someone else recently reported the same type of problem.
It seems it was caused by a Trojan that hides itself when Task Manager is opened.

Take a look at this thread, especially the links in Post # 18.
CPU Usage @ 100%

Hope this helps,
My System SpecsSystem Spec
23 Dec 2012   #3

Win7 Home Premium 64x

I helped someone with this same problem same suggestion, same solution. seems this virus is getting around...

CPU behaving strange, running at 100%, unless Task manager is open

follow the steps listed in the microsoft forums post:

posted by Ishurean on the forum
1/ Open the Task Manager (and let if open)
2/ Go in C:\Windows\System32 and delete "igfxupdate.exe"
3/ Go in C:\Windows\SysWOW64 and check if "igfxupdate.exe" is also here, if yes delete it
4/ Open the windows services management console
Start > Execute > services.msc or Start > type "services.msc" in the search bar (Windows 7)
5/ Look for "Search Indexer" -> Right click -> Properties and change the "Automatic" into "Disabled"
6/ Reboot
7/ Open the Windows CMD as an Administrator
Start > type "cmd" in the search bar (Windows 7) -> Right click -> Run as an Administrator
8-> Type "sc delete SearchIndexer" then hit Enter
My System SpecsSystem Spec

23 Dec 2012   #4

windows 7 ultimate 64 bit

Thanks for the quick and correct answer to both of you. I made the mistake of going to tomshardware originally for the answer...... oops. That solved the problem quickly and easily. So from now on, I know where to go for help. 'Cause I actually got help instead of 100 views and nothing else.
My System SpecsSystem Spec
23 Dec 2012   #5

Win 7 Pro x64 SP1, Win 7 Ult x86 SP1

You're welcome, and glad you got it fixed.

Happy Holidays
My System SpecsSystem Spec

 CPU stuck @ 100% unless task manager is open

Thread Tools

Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 10:40 AM.
Twitter Facebook Google+

Windows 7 Forums

Seven Forums Android App Seven Forums IOS App

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33