Quickbooks Desktop suddenly won't open .net runtime error c0000005 faulting module features.dll

Found the answer here:

https://quickbooks.intuit.com/learn-support/en-us/install/qbpro-2019-crash-with-features-dll-error/0...

disabling the security policy as described in the above post fixed the problem, Thank you to the poster.

I am having the exact same problem.  Same error output and same operating system.  Unfortunately, my FIPS is already disabled so that fix won't work.  I even tried enabling/rebooting/disabling/rebooting.  Another colleague had the same problem and ultimately reset his computer which fixed the problem.  I didn't have luck with that either.  I also tried the Tool Hub without success.  Would really appreciate any other ideas.  

Thank you.

Thanks for joining the discussion and sharing the things you've done to resolve the problem, @tb38,

If the QuickBooks Tool Hub doesn't fix the error when opening QuickBooks, run the Repair Tool. This utility resolve common errors in the software. Perform the steps below:

1. Create a back up your company file beforehand to avoid any accidental data loss.
2. Reboot the computer and tap the Windows Start menu.
3. Find Control Panel on the search field or select it from the list.
4. Press Programs and Features then Uninstall a Program.

   Note: If you don't see Programs and Features, select Programs instead. Then select Program and Features.

5. Pick QuickBooks from the list of Programs, then press Uninstall/Change.
6. Click on Continue, or Next. then Repair.
7. Press Next again then wait for the tool to start its diagnosis.
8. Hit Finish when done.

To learn more about repairing the program and the complete instructions, go to this link: Repair your QuickBooks Desktop for Windows.

If you get the same problem after this troubleshooting, I recommend reaching out to our Technical Team immediately. Our representatives can run some database fixes and diagnosis to identify underlying issues with this unexpected behavior.

Here's how to get support:

1. Go to your QuickBooks Home page, then click the Help menu at the top.
2. Choose QuickBooks Desktop Help from the drop-down.
3. Hit the Contact us icon.
   

Kindly update me on how things go by adding another comment below. I want to make sure you're all set, and I'm here if you need further guidance. Have a great day! All the best.

I ran across this nonsense today. Same error with features.dll. Program would start up and then close. 

The tool hub is completely useless. So don't even bother with that.

Uninstalling the program and deleting the folders from all the locations where intuit stores files did not work either.

What worked in my case was this. I downloaded the latest version of .Net from here. I installed .Net 4.8.1 and restarted. 

This time when I restarted the program. It actually started up and let me in. 

So for those of you with this issue. Try updating .Net on your system.