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DRIVER_IRQL_NOT_LESS_OR_EQUAL will cause your computer to go to the blue screen of death but do not worry there are solutions around this and we are here to instruct you on how to solve this.
DRIVER_IRQL_NOT_LESS_OR_EQUAL is most commonly tied to bad network drivers, whatever that be a corruption of the driver files or their incompatibility. So first thing is to check if this is the case.
Press ⊞ WINDOWS + X to open the hidden menu in Windows and click on Device Manager.
In the Device Manager expand Network adapters, choose adapter, right-click on it and choose Uninstall.
Install latest driver or reboot so Windows will install the driver automatically
If you do not want to reinstall the driver or you are unable to for whatever reason updating the driver might do the trick. To update driver:
Press ⊞ WINDOWS + X to open the hidden menu in Windows and click on Device Manager.
In the Device Manager expand Network adapters, choose adapter, right-click on it and choose Update Driver.
If both of the beforementioned solutions fail, try running the command prompt and fix the issue from there.
Press ⊞ WINDOWS + X to open the hidden menu in Windows and click on Command Prompt (administrator)
In command prompt type next line and press ENTERDEL /F /S /Q /A “C:\Windows\System32\drivers\mfewfpk.sys
Reboot the system
Sometimes corruption in the system is caused by malware, Scan your system for malware, viruses, etc.
If all methods fail, open your PC case and check to see if connections everywhere are properly connected and tight. Clean your PC and turn it back ON
If anything fails, use Windows system restore and bring back computer into a state where everything was working fine.
“The last product key you entered can’t be used on this copy of Windows (0xc03f6506).”This particular error tends to occur when you go on to activate Windows 10 although it can also appear during the upgrade process. In such cases, you will see the following error message:
“Unable to upgrade your edition, We can’t upgrade your edition of Windows. Try upgrading your edition of Windows again. (0xc03f6506).”To fix the Activation Error Code 0xc03f6506 in Windows 10, use the options provided below as references but before you proceed, make sure that you create a System Restore point first.
setup.exe /auto upgrade /pkey <YOUR WINDOWS 10 PRO EDITION PRODUCT KEY>After entering the command, check if it was able to fix the Windows Upgrade or Activation error 0xc03f6506. If not, refer to the next given option below.