MaureenOosthuizen

Driver_irql_not_less_or_equal (mfewfpk.sys)

Hi I have just upgraded from windows 8 to 10 on my laptop and now I am on a permanent loop with the above error and my computer won't start up. I do not have McAfee installed. What do I do now.

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Answer

A. User

Hi,

Thank you for contacting Microsoft Community.

With the issue description, I understand that you get an error message “Driver_IRQL_Not_Less_or_Equal (mfewfpk.sys)” whenever you reboot the computer. I will certainly help you in getting this issue resolved.

I appreciate your effort towards resolving the issue.

If you could help me with more information, I would be able to provide you more effective solution

Was McAfeeSecurity Software installed on your computer earlier? If Yes, Is it still installed?

I would like to inform you that this issue might be occurring because of McAfee security software. “mfewfpk.sys” is a component of McAfee and this often cause BSOD error as specified.

If you have McAfee installed on your computer in the past or have right now, I would suggest you to download the McAfee removal tool and uninstall the program using below mentioned link

http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe

Hope this information was helpful and do let us know if you need further assistance. We will be glad to assist.