This post fromMiniTool Solutionwill help you.

It will show you some possible solutions for this error.

Hope they can be helpful to you.

click Open Task Manager

However, some errors may happen which could prevent you from installing Windows updates.

The C0000034 applying update operation 207 of 109520(00000…) is one of these errors.

Hence, if you are experiencing this error, keep reading and get some fixes from this post.

How to Clean Boot Windows 10 and Why You Need to Do So?

Fix 1: Clean Boot Your PC

The third-party app or program could interfere with your updates.

Step 1: TypeSystem Configurationin theSearchbar, navigate to it and chooseOpento open it.

Step 2: Switch to theServicestab, checkHide all Microsoft servicesand clickDisable all.

run the Windows Update troubleshooter

Step 3: Then switch to theStartuptab and clickOpenTask Manager.

Step 4: On theStartuptab inTask Manager, select all items one by one and clickDisableto disable them.

Step 5: CloseTask Managerand reset your box.

8 Useful Fixes for an Error Occurred While Troubleshooting!

Cant run a program or install an update?

you might perform a clean boot to find conflicting programs.

Learn how to clean boot Windows 10 from this post.

Turn off Windows Defender Firewall

Here is how to do that.

Step 1: PressWin+Ion your keyboard and clickUpdate & Security.

Step 2: ClickTroubleshooton the left.

6 Solutions to DISM Error 87 Windows 10/8/7

Step 3: Then clickWindows Updateon the right list and clickRun the troubleshooter.

After that, the fatal error C0000034 applying update operation on your machine should be solved.

Receive “an error occurred while troubleshooting” message when using Windows Troubleshooters to fix some issues?

Here are 8 helpful ways to fix it.

Step 1: Typecmdin theSearchbar, right-clickCommand Promptand chooseRun as administrator.

Then, look to see if the error is gone.

Here is a quick guide on how to disable your Windows Defender Firewall.

Step 1: Typefirewallin theSearchbar, selectWindows Defender Firewalland clickOpen.

Step 2: ClickTurn Windows Defender Firewall on or offand checkTurn offWindows Defender Firewalland clickOK.

Step 3: start your machine.

If you are using a third-party antivirus program, remember to disable its own firewall, too.

After that, see if the error is fixed.

This post shows how to fix the DISM error 87.

Bottom Line

Thats all the information about the solutions for the fatal error C0000034 applying update operation.

If you are encountering this error, try the methods mentioned above.