The Blue Screen of Death Error 0X000000D1 DRIVER_IRQL_NOT_LESS_OR_EQUAL is more common than we think. It usually occurs after every 2-3 days unless the cause is rectified.
Causes
The causes behind the error could be a faulty device driver, an issue with the BiOS, or an interfering system service.
Since we can usually log in to the system, we could boot the system in normal more. Else, we could boot into the system in Safe Mode as suggested here.
Try the following preliminary steps:
1] Scan your system for virus and malware, either using Windows Defender or any reputable 3rd party anti-virus.
2] Uninstall any recently installed suspicious software.
3] Update windows and mentioned here.
4] Run the Blue screen troubleshooter. Go to Settings >> Updates and security >> Troubleshoot >> Blue screen. 
Restart your system after running the troubleshooter.
If they don’t help, proceed with the following solutions:
1}Update all the device drivers
2} Update the BiOS
3} System restore
Solution 1] Update all the device drivers
The general procedure to update device drivers is as follows:
1] Press Win + R to open the Run window and type the command devmgmt.msc. Press Enter to open the Device manager window.
2] Right-click and update all the drivers one by one.
Since it is difficult to update all the drivers, we could use 3rd party tools available online to help with the same.
Solution 2] Update the BiOS
Another reason behind this issue is an unsupportive BiOS. We could download and install the latest version of the BiOS from the manufacturer’s website.
Solution 3] Check for memory problems with the system
1] Press Win + R to open the Run window and type the command mdsched.exe. Press Enter to open the Windows Memory Diagnostics window.
2] Select Restart now and check for memory problems.
This would automatically check for issues with the system.
Solution 3] System restore
We could also restore the system to a previous date. It would be helpful in restoring the previous drivers as well.
1] Press Win + R to open the Run window and type the command rstrui.exe. Press Enter to open the System restore window.
2] Here you would find 2 options: one is a recommended restore date and time and the second is to choose a different restore point. Choose whichever option is favorable to you and update the system.
Hope it helps!
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