While opening the ‘Event Viewer’, the security center failed to validate the caller with error dc040780 that might prompt on your PC screen. Now, you search the fixes here & there and find this article.

Yes, indeed, you have come to the right place.

In the entire article, I will compile all possible fixes of error dc040780.

7 Fixes of the Security Center Failed to Validate Caller With Error Dc040780

Generally, one opens the ‘Event Viewer to check the cause of the system issue. You are also doing so. But, unfortunately, error dc040780 becomes evident. Confliction between the Windows security system and third-party application might be the cause behind the error.

However, if you face it, the first thing you have to do is update the Windows. After doing so, if the error still exists, you can fix it by applying the following fixes.

Before starting the brief of the issue, let’s have short look over the fixes-

• Fix 1: Troubleshoot in Clean Boot State
• Fix 2: Uninstall Third-Party Antivirus
• Fix 3: Disable Windows Defender and Windows Firewall
• Fix 4: Disable Windows Defender via ‘Registry Editor’
• Fix 5: Disable Windows Security Center via Registry Editor
• Fix 6: Update BIOS Firmware
• Fix 7: Uninstall the Problematic Software

Fix 1: Troubleshoot in Clean Boot State

You may run the Windows troubleshooter in a clean boot state. You configure it by applying the below steps one by one.

Step 1

Tap the Windows key and type ‘MSConfig‘. Then you have to press ‘enter’.

Step 2

Consequently, the ‘System Configuration’ interface will appear. You need to click on the ‘General’ tab. Here, you will find ‘Selective startup’. Mark it. Then check the ‘Load system services’ and ‘Use original boot configuration’ boxes and uncheck the ‘Load startup items.

Step 3

In this step, you have to click on the ‘Services’ tab. Here check the ‘Hide all Microsoft services‘ and press the ‘Disable all’ option. Finally, press ‘Apply’ and ‘Ok’ then.

This process configures the windows to a clean boot state.

Step 4

At this stage, you have to use the Windows troubleshooter. Then check the finding errors and apply the suggested fixes.   

In the end, check that the error message vanishes or not. If not, then return the ‘System Configuration’ settings as the previous view.

Fix 2: Uninstall Third-Party Antivirus

Third-party antivirus is one of the possible reasons behind the issue. You can fix the error by uninstalling the antivirus from your PC. To do that, you have to follow the steps described below.

Step 1

Press the Windows and ‘I’ keys together. The interface of ‘Settings’ will appear. You have to find out the ‘Apps’ section from here.

Step 2

You will see the ‘Apps & Features’ option on the left sidebar. After selecting it, the installed applications and other features will be visible on the right sidebar.

You have to find out the installed antivirus from here. While clicking on the finding, you will see the ‘uninstall’ option. Tap the button to uninstall it.

If you do not want to remove the third-party app, you need to move to the next fix.

Fix 3: Disable Windows Defender and Windows Firewall

The fix you may apply instead of uninstalling third-party antivirus. Disable the ‘Windows Defender‘ and ‘Windows Firewall’ might be an easy task. You can do it according to the following steps.

Step 1

Press the Windows and ‘I’ keys together. Here you will see the ‘Update & Security‘ option at the bottom of ‘Settings’. Click on it.

Step 2

Then you have to work with the ‘Open Windows Security section.

Step 3

In this step, you have to click on the ‘Firewall & network protection’

Step 4

Here you will see the ‘Private network (active)’ option. Press on it

Step 5

‘Microsoft Defender Firewall’ will become evident. You have to toggle ‘Off’ from ‘On’.

Step 6

From this step, you need to go back to the ‘Open Windows Security’ section again. Here you will find the ‘Virus & threat protection section. Enter into it.

Step 7

Now you need to work with the ‘Virus & threat protection‘ settings. You have to turn ‘Off’ all the settings.

Finally, restart your computer and check the issue, exists or not.

Fix 4: Disable Windows Defender Via ‘Registry Editor’

If the issue still exists, you can disable Windows Defender through the ‘Registry Editor’. You can do it by following the below steps

Step 1

Press the Windows and ‘R’ keys together to open the ‘Run’. You have to type ‘Regedit on the ‘Open’ box.

Step 2

While opening the Registry Editor, copy and paste the following direction on the top box-

“HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender”

Then you have to press ‘enter’.

Step 3

After reaching the correct location, you need to right-click on the blank space of the right sidebar. You will see the ‘New’ option with some other options. Expand the ‘New’ option and select ‘DWORD (32-bit) Value’.

Step 4

Rename the value as ‘DisableAntiSpyware‘ and double-click on it. Put 1 into Value data and select ‘Hexadecimal’ as ‘Base’. Finally, you have to press ‘Ok’ to keep the change.

Now, you need to restart the PC again. Check the issue. Is it solved or not? If not, you still have a couple of options.

Fix 5: Disable Windows Security via Registry Editor

You can disable Windows security via Registry Editor. It is another fix of the error dc040780. To do that, you need to follow several steps.  

Step 1

Open the Registry Editor again. You can open it applying the same way we did in the previous fix. After that, copy and paste the following direction on the top search box.

“HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SecurityHealthService”

At the end of this step, you have to press ‘enter’.

Step 2

Next, you will find the ‘Start’ value on the right sidebar. Double click on it. Consequently, an interface will appear on the screen. Here you need to make ‘Value data’ 4 and select ‘Hexadecimal’ as ‘Base’. Then, press ‘Ok’.

Step 3

Again, you have to copy the following direction and paste it to the Registry Editor navigation bar.

“HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc”

Here you have to change the settings of ‘wscsvc’ as like as ‘SecurityHealthService’ settings.

By applying these steps, Widows Security Center will be disabled. Now, restart the PC and check the issue. Does it vanish or not?

Fix 6: Update BIOS Firmware

Update BIOS firmware is a proven solution to the issue. You can try the fix if the error still exists. The process varies differently for different motherboard manufacturers. You will find it in the manual book provided by the manufacturer.

However, you have to be conscious of the unexpected happening while updating the BIOS Firmware. Hopefully, you will be able to fix the issue.

Fix 7: Uninstall the Problematic Software

Problematic software can be another reason for the error dc040780. If you find any trouble while using software like McAfee Security Scan Plus or Acronis True Image, or other else, you may try to uninstall and remove the software to fix the error. 

You can uninstall any app or feature by following the steps described below.

Step 1

Tap the Windows key and type ‘apps & features. Consequently, System Settings will be visible. You have to press on it.

Step 2

Then you need to find out the problematic app. You will find it on the right sidebar under the ‘Apps & Features’ section.  

Step 3

After finding the app, you have to click on it. The option ‘Uninstall’ will become evident. You can uninstall the app by pressing it.

You can uninstall any app by following the same direction.

Final Words

Before ending, I would recommend you to try Fix 2 or Fix 3 to fix the error dc040780 quickly. Because the conflict between third-party antivirus and windows defender is one of the main reasons for the error. While disabling one of them, hopefully, the message will not appear anymore.