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When a System unable to perform an operation with an appropriate way we can find many reasons behind this issue, here the driver error occurs if the driver which is trying to access an invalid address while the IRQL is too high and due to the improper address it unable to perform an operation and return error message to the user. If there is any error code in the ISA server of 2006 and if the ISA server is corrupt or crash due to Fweng.sys, the user receives the stop error message on the PC screen. So it is most necessary to a user to fix “DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)” Stop error message from the Windows Operating System.

  • The most common reason behind this error is installing incompatible or outdated driver, missing system files, corrupted registry file or damaged pc by viruses. Advanced System Repair Tool is the only solution for all the system errors. By installing this tool you will be able to remove above windows error.
    3 Steps to Fix this Error

    Step 1. Download Advance System Repair Tool [File Size: 15.7 MB]
    Step 2. SCAN your Windows PC
    Step 3. Click Fix button to Repair Error

Symptoms of the “DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)” error message
When the Microsoft Internet Security server 2006 is corrupt or crash due to Fweng.sys at such moment the user receives the below-given error message on the PC screen

Cause of the “DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)” Error message

This driver error occurs due to access an invalid address while the IRQL was too high. We can say if the driver used improper addressed which contain the first parameter with a same value. This issue occurs if the first parameter has the same value as the fourth parameter and the third parameters which indicate the execute operation and at such moment if the System driver tries to execute the code which contains fault page. This fault page execution code are described below
If the function was called by applying the pointer and if it is an invalid pointer, the function which is marked as pageable which was run on high IRQL and the calling function which is a call from another dive which was unloaded etc. So it is most necessary to a user to know how to resolve”DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)” Stop error.

Solution of “DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1)” Stop error

To get a solution from this issue you have to first restore the registry in Windows and you can apply hotfix service in your System. The hot fix is the product of Microsoft Corporation and you can find it from the Microsoft website. Here given some manual steps to modify the value of DisablePeriodicPortCleaning registry key after applying the hotfix. To modify registry key and to restore the Windows registry you can follow here.

First locate the path HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Fweng\Parameters\DisablePeriodicPortCleaning ,Then you have to select from the Edit menu and click on Modify then type 1 and press ENTER to close the operation.

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Solution of DRIVER_IRQL_NOT_LESS_OR_EQUAL (d1) Error

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