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I have noticed that from some time my system is freezing and its probably caused by the high CPU usage which is caused by the system process.

All applications I'm running is the Skype, TeamSpeak and Chrome so it definately shouldnt eat that amount of CPU.

You can see the problem itself and running processes in the screenshoot below:

(I cant post the images due to the low reputation amount, so if anyone could edit my post with the image posted below would be nice ).

enter image description here

Sometimes CPU usage is reaching 90%, but the average usage is like 40-65%.

My PC parameters:

  • Windows 8 (customer preview)
  • Intel Core i3 - 2350M
  • 8 GB RAM

I'd appreciate any help attempt ! Regards.


As the user below posted a great answer, I have noticed that the process that is eating the most CPU in the system is called Arthurx.sys, simple google tells that it's a TPLink driver (an wifi adapter, I have bought like 2 weeks ago!) drivers has been installed from the Windows MSDN, but also tried to install the drivers from the attached CD, but it doesn't help. From the system start, it is using like 5% of the CPU only, but after 2-4 hours of working it is growing up and reaching 40-60% of the CPU usage.

Device name: TPLink WN722N

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Point of order, if you're running the customer preview, everything isn't up to date... You're running the customer preview. –  Everett Jan 3 '13 at 3:58
@Everett Yea, probably you're right... but still it shouldnt happend, even if its a customer(or release) preview. –  Scott Jan 3 '13 at 4:07
@Scott Yes, this kind of thing should happen in a customer preview. I mean, of course it's better if those bugs don't exist in the first place, but this is one the things a preview is intended to do. It's a chance to for users see new features and user interface elements a little early, and check app compatibility, but also a chance for the dev teams to get feedback and find bugs from a wider audience. The core system is not at all ready for production use yet. It's not intended for use as your main system, because it's not fully done or debugged. If it were, they would go RTM with it. –  Joel Coehoorn Jan 3 '13 at 4:38
use xperf to trace it. But as other users told you, stop using the CP. All pre-Release version will expire in 2 weeks! –  magicandre1981 Jan 3 '13 at 5:02
The only way we can help you is if you Verify this problem exists in the RTM Version of Windows 8. You cannot expect anyone to help you with problems that exists in a Preview release. I went ahead and updated the tags to reflect your using a preview version. –  Ramhound Jan 3 '13 at 12:47

2 Answers 2

This can be caused by a faulty driver or other module loaded by the system. To look inside the System process, you can use a tool like Process Explorer.

Download and run it, then select the System process, right-click and select Properties:

enter image description here

Switch to the Threads tab (ignore the dialog box that mentions symbols):

enter image description here

This will show which file is using the excessive CPU usage, from which you can then attempt to diagnose it.

As others have said in the comments however, you really do need to move away from the Preview versions as soon as possible!

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Thank your for your answer. Please see my updated question. –  Scott Jan 3 '13 at 17:46
@Scott I noticed that you're upgrading now; if this issue is still not resolved after that, TPLink have a beta Windows 8 driver on their site available which may help. It can be found here:… –  Graham Wager Jan 3 '13 at 18:00
It seems risdxc64.sys is a usual suspect with Thinkpad laptops which is the driver for the card reader, see e.g. here:… - I solved it by reinstalling the latest one on win 10 –  for3st Aug 7 at 10:29

I had the same problem, it disappeared when I removed one of the RAM modules. It seems it was faulty. Running Windows 7, 32-bit.

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