A13 is my current system BIOS. So I have to update to the nearest version like A17?

What BIOS release version is running on the system?  Sometimes, and intermediate version is required to update to the latest one.

I have already installed the A17 version and it was successful but when I tried to install A19 I encounter the same problem, still unsuccessful.

Who told you that it A19 was necessary for Windows 10 ?

Hi, I have the same problem with A19 BIOS update. I tried to do update from Windows level and also using bootable USB. It was possible to do update BIOS to A17 and A18 but file D630_A19.exe gives error (Failuer to analyze flash image -errorcode 504h). All files mentioned above are from Dell website.

It seems to be something wrong with file D630_a19.exe prepared by Dell. How to alert proper person from Dell about that issue?

Just curious, but have you tried downloading a second copy of the A19 BIOS update...in the event the first one was corrupted during the download?

I see the same problem on my Latitude D630 XFR with the A19 BIOS installer. If I run the A17 installer, it opens fine, but shows I already have BIOS A17 installed. If the A17 installer launches, and the A19 installer fails to open, that sounds like a problem with the installer, not the laptop.

I think we are at Dell's mercy here to provide a fixed installer.

Try installing in Compatibility Mode if you are running Windows 10.

Same with the dos version.  Probably a bad compile or image.  Hash matches download, so it’s up to Dell to fix.  Not sure how to contact the web people.

Same here. No issue with any of the previous BIOS files released, just with A19. Not a download issue as checksums match, seems like a bad build.