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!
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...
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