Luckily, this post fromMiniToolhas collected several methods for you.
It is pretty common to encounter different BSOD stop codes such asDRIVER VERIFIER IOMANAGER VIOLATIONandDRIVER VERIFIER DMA VIOLATION.
And this post focuses on DRIVER UNLOADED WITHOUT CANCELLING PENDING OPERATIONS (DRIVER_UNLOADED_WITHOUT_CANCELLING_PENDING_OPERATIONS).

Now lets take a look at how to fix the error.
Here is the tutorial:
Step 1: Right-click yourStartbutton to chooseSettingsand then chooseUpdate & Security.
Step 2: ClickWindows Updateand then chooseCheck for updateson the right panel.
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If your system is not up to date, Windows will automatically download updates.
Step 4: reset your PC and then look to see if the error is fixed.
Troubled by the issue Windows Updates cannot currently check for updates?

This post shows 4 solutions to fix Windows update failed problem.
Step 2: Right-poke the unit with a yellow indication to chooseUpdate driver.
If you have several devices with yellow indications, then do the same as above for all.

Step 4: Reboot your system and then see whether the error is gone.
Step 3: TypeDISM.exe /Online /Cleanup-image /Restorehealthin the window and then pressEnter.
Wait for the process to complete.
Step 4: Typesfc /scannowin the window and then pressEnter.
Wait until the process finishes.
Step 5: kickstart your system to verify if the error is fixed.
Here is a quick guide:
Step 1: OpenSettings, chooseUpdate & Securityand then go to theTroubleshoottab.
Step 2: ClickBlue Screenin the right panel and then clickRun the troubleshooter.
Bottom Line
How to fix the DRIVER UNLOADED WITHOUT CANCELLING PENDING OPERATIONS error in Windows 10?