cancel
Showing results for 
Search instead for 
Did you mean: 
  • ×
    Information
    Fix HP Printer issue in macOS

    A [software component] will damage your computer message displays when printing or while installing - Click Here

    Information
    Fix Windows 10 Update Issues

    Resolve Windows 10 or update issues on HP computer or printer– Click Here

  • post a message
  • ×
    Information
    Fix HP Printer issue in macOS

    A [software component] will damage your computer message displays when printing or while installing - Click Here

    Information
    Fix Windows 10 Update Issues

    Resolve Windows 10 or update issues on HP computer or printer– Click Here

  • post a message
Note for common printer problems
Customers receiving the"will damage your computer" message along with others like "unable to access cups/tmp" or "'@%' cannot be opened" need to update their version of the macOS. Please check this article for more information: HP Printers - A [software component] will damage your computer message displays when printing or while installing (macOS) .
Highlighted
New member
2 1 0 0
Message 1 of 4
93
Flag Post

Difxapi.dll module loaded, but DllRegisterServer entry point was not found

HP Recommended
Photosmart 7520
Microsoft Windows 10 (64-bit)
Hey,

I am using Windows 10 Pro, version 2004, in 64 bit version.

I have had to uninstall my HP printer software due to printer problems. I have removed the software via the windows option to remove software. So in a normal way.

When reinstalling the software (suitable for Windows 10 64 bits) I get an error message:

"installation error: InstallCustomActions: DIFxAPI.dll is NOT installed"

I then searched for this file on my c: drive and found it in many directories. Also in the C: \ windows \ system32 folder.

After some internet searching I tried registering file again in command prompt with the command regsvr32.

I then get the following message:

"Difxapi.dll module loaded, but DllRegisterServer entry point was not found. Make sure difxapi.dll is a valid DLL or OCX file, then try again.

I have no idea what to try now. So any help is welcome!
3 REPLIES 3
Highlighted
HP Support Agent
HP Support Agent
24,137 24,025 1,333 1,418
Message 2 of 4
Flag Post
HP Recommended

@HendrikJannes

 

Welcome to the HP support community.

 

Perform root level uninstallation to remove all the printer related software's.

  • In Windows, search for and open Programs and Features.
  • Select your HP printer.
  • Select Uninstall.
  • In Windows, search for and open Devices and Printers.
  • In the Devices and Printers window look for your HP Printer. If you see it listed, right-click on it and choose "Delete" or "Remove Device.”
  • Open up the run command with the "Windows Key + R" key combo.
  • Type printui.exe /s and click OK.
  • Click on Drivers tab.
  • Look for HP Printer driver. If you see it click on it and click Remove at the bottom.
  • Select OK.
  • Remove all instances of the same.
  • Select Apply and OK on the Print Server Properties windows.
  • Close Devices and Printers. 
  • Restart the PC again.

Download and install printer full feature driver

Click here to download the driver.

 

I hope that helps.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.

Sandytechy20
I am an HP Employee

0 Kudos
Highlighted
Author
New member
2 1 0 0
Message 3 of 4
Flag Post
HP Recommended

Hello SandyTechy20,

 

thanks for your suggestion but it didn't work.  Still getting the same notification when installing the software: after step 1 of 3 the notification '"Installation error: InstallCustomActions: DIFxAPI.dll is NOT installed" appears.

 

In fact, now it isn't possible at all to print or scan using the HP Smart app I used the last few days. Adding  the printer again in windows is still possible but because the driver isn't installed HP  Smart will not print or scan anymore. I also  tried to install the basic driver but again above mentioned installtion error appears.

 

Printing a document out of MS Word doesn't work either (cannot select the HP Photosmart...)

 

Rather strange however is that scanning with the HP scan and capture app, works fine.... but this still leaves me with no printing option at all...

 

so I really don't understand what is going wrong...

0 Kudos
HP Support Agent
HP Support Agent
24,137 24,025 1,333 1,418
Message 4 of 4
Flag Post
HP Recommended

@HendrikJannes

 

This might require remote access of your computer to fix the issue.

I request you to talk to HP support.

They might have multiple options to help you with this.

  1. Click on this link - https://support.hp.com/us-en/contact-hp?openCLC=true
  2. Select the country.
  3. Enter the serial of your device.
  4. Select the country from the drop-down.
  5. Click on "Show Options".
  6. Fill the web-form. A case number and phone number will now populate for you.

I hope that helps.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.

Sandytechy20
I am an HP Employee

0 Kudos
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation