Comments on: Fix Driver Irql Not Less Or Equal Error

By: Andy

Andy — Tue, 17 Jan 2012 09:12:05 +0000

@Joanne – The agnfilt.sys is part of the AT&T AGN client. Have you recently installed that software, or made changes to it?
You can try upgrading to the latest version of the AGN client first.
But I would also run a check for viruses and malware, as some rootkit viruses can also cause this behavior.

By: Joanne

Joanne — Mon, 16 Jan 2012 19:25:04 +0000

Driver IRQL not less or equal error…. addl info…from my earlier post… My husband is getting the same error with the same file. (agnfilt.sys) We work for the same company…both have the same standard image and the same file showing up on the BSOD …the

By: Joanne

Joanne — Mon, 16 Jan 2012 19:15:05 +0000

I am getting the blue screen and errors…when i see the blue screen it shows agnfilt.sys as the file name… anyone know what this is… ?

By: Andy

Andy — Tue, 03 Jan 2012 18:03:31 +0000

@jenny - The compaq presario cq60 uses an nforce chipset from nvidia, so from the HP website you can download the nforce chipset drivers for that model. The link I provided is for the 32-bit version. If you have Windows 7 64-bit, you need to select that.

By: jenny

jenny — Tue, 03 Jan 2012 15:45:25 +0000

tried with comand prompt as you said no violations were found…

By: jenny

jenny — Tue, 03 Jan 2012 14:44:22 +0000

hi andy… thanks for your reply… i have a presario cq60 212ea and i run windows 7 on it… hope you can help me… tks…

By: Andy

Andy — Tue, 03 Jan 2012 10:54:59 +0000

@jenny – The PCI bus is a bus type on the motherboard, and can be used for expanding a computer’s functions (like a video card or network card).
The PCI bus is supported by the motherboard chipset, and as such, it would be best to first try and reinstall the chipset drivers for your computer motherboard.
That can be an Intel chipset driver, VIA, nForce, really depends on the computer brand or motherboard brand. If you can let us know the details of your computer, I can try and provide a link. Also include your Windows version please.

Another option is to run a command prompt, and type “SFC /SCANNOW” followed by Enter.
This will check the Windows system files and tell you if something is wrong (and offer to fix it). You need to use an administrator account for this.

By: jenny

jenny — Tue, 03 Jan 2012 09:18:03 +0000

hi… can anyone help me? i get the error driver irql nott less or equal very often now… first it was like 2-3 times a day… looked into device manager checked each one(resources) i found one that it is in system devices called pci standard pci-to-pci bridge that it says “this device isn’t using any resourcers because it has a problem” driver details: \system32\DRIVERS\pci.sys please can anyone tell what should i do? thanks a lot..

By: Andy

Andy — Sat, 03 Dec 2011 03:26:13 +0000

@Matt – The best way to see which driver is indeed the mention of a .SYS filename on the BSOD itself. But if you cannot or do not want to get the BSOD to see that, it is also possible to identify the most likely driver from the minidump file.
But you need to run the minidump through the windows debugger to see that, and that takes a bit of effort and knowledge to install and run.
So in your case, from your description, I would recommend that you update or reinstall the network driver (or wireless lan driver if you use wireless Internet), and also the video driver.

By: Matt

Matt — Fri, 02 Dec 2011 21:56:54 +0000

I’ve XP and have been getting the irql error-

I get the message when streaming video or when my kids play games on the internet.

I’m in the process of updating out of date drivers, but have lost the irql error information and am loathe to intentionally get the BSOD on purpose again.

Any guess which driver is causing the problem? Thanks for any help that can be provided, this is very informative stuff!