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WIndows 7 High CPU Usage - System Interrupts


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#1 Adiron

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Posted 19 May 2010 - 11:09 PM

I just installed Windows 7. The CPU usage since I have started running it is staying at 100% constantly. When I go into resource manager it says that the process "system interrupts" with description " deferred procedure calls and interrupt service routines" is taking up an average CPU of 90. I have read that this may be a driver issue or that it may be a conflict between onboard graphics and a graphics card. I have both onboard and a card. I think I disable the onboard through BIOS when I installed the card. Do I need to do this again. The windows automatic update said it successfully installed the video card driver. Not sure about any other drivers.

Here are my specs (except that I have added 1gb of RAM for a total of 2gb and installed a ATI Radeon Saphire HD 3650 graphics card).


http://h10025.www1.hp.com/ewfrf/wc/documen...035&lang=en

Thanks in advance for your help

Edited by Adiron, 19 May 2010 - 11:12 PM.


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#2 DSTM

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Posted 20 May 2010 - 01:56 AM

Windows7 reads CPU differently to say XP,and nearly always at the high end of the Scale.

Go directly to Nvidia Website for latest Drivers.















#3 Adiron

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Posted 20 May 2010 - 04:44 PM

The computer is extremely slow and unusable. I have installed the latest drivers for my ATI card not NVidia. That didn't fix the problem. This is an extremely common problem from what I have seen on the internet.

When I go to the device manager it says that there is an Unknown Device and that no driver is installed. Not sure what this is. When I run the upgrade advisor it says that ACPI/AWY0001 is unknown and they don't have compatibility info.

Also, just found something that said this may be related to away mode not being compatible with Win7 x64. It says to disable away mode in BIOS

Edited by Adiron, 20 May 2010 - 06:04 PM.


#4 DSTM

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Posted 20 May 2010 - 10:05 PM

Here are some explanations to acpi/AWY0001.

http://www.google.com.au/search?client=ope...-8&oe=utf-8















#5 kilgorecemetery

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Posted 21 May 2010 - 12:42 AM

Ironically I had the same problem with my computer. I also had an MSI mobo and also had problems with my video card. In the end it turned out that the motherboard simply doesn't support Windows 7 64bit, but would support XP 64 bit or Win7 32 bit. I noticed a substantial difference when i removed one of the sticks of ram. From what I found it just needed a BIOS update, but MSI never produced one for win7 64bit. You may want to check with MSI or HP/Compaq for the update. If it helps here's my specs:

MSI MS-7350
Intel Core 2 Quad q6600
GeForce 8400 GS
2 x 2GB PC2-6400 RAM

PS. When I took out one of the sticks of RAM the CPU usage dropped down to where it should be, but the system was still very unstable.

#6 Darth sidious

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Posted 21 May 2010 - 01:30 PM

I just installed Windows 7. The CPU usage since I have started running it is staying at 100% constantly. When I go into resource manager it says that the process "system interrupts" with description " deferred procedure calls and interrupt service routines" is taking up an average CPU of 90. I have read that this may be a driver issue or that it may be a conflict between onboard graphics and a graphics card. I have both onboard and a card. I think I disable the onboard through BIOS when I installed the card. Do I need to do this again. The windows automatic update said it successfully installed the video card driver. Not sure about any other drivers.

Here are my specs (except that I have added 1gb of RAM for a total of 2gb and installed a ATI Radeon Saphire HD 3650 graphics card).


http://h10025.www1.hp.com/ewfrf/wc/documen...035&lang=en

Thanks in advance for your help


Hi searching thru hp site for drivers and software updates for windows 7 for your pavilion a1267c desktop hp dont support it with updates for windows 7 see link below and click drop down and you will see.

http://h10025.www1.hp.com/ewfrf/wc/softwar...mp;lang=en&

You can get drivers for windows 7 for your graphics card from the ultility in the link below.

http://www.sapphiretech.com/presentation/d...1.aspx?psn=0006

For your motherboard open up your pc case and on the motherboard somewhere near the pci-e slot and pci slots there will be the model no an example 790xt-g45 provided a link below for you to check and there is an archive you can search to download drivers for your mobo which are windows 7 compatable.

http://eu.msi.com/index.php?func=prodpage2...amp;cat3_no=537

Cant't help with pre-installed hp software for any software you've installed go to manufacturers website and update if experiencing problems.

Download the windows 7 upgrade advisor and run it will tell you what is compatable and what is not and whether it can be updated link below do this first before anything else and print off if possible.

http://www.microsoft.com/downloads/details...;displaylang=en

Hope it helps.
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