Win8.1 pro to W10 Enterprise in place upgrade.

That should work because you need to purchase the Windows 10 Enterprise license anyway. So when you begin the upgrade, it will ask you for licensing and you can enter that.

Sure. Why do you ask?

Nothing is ever as straight forward as it seems when it comes to MS upgrades.

Just an FYI ,this is an OEM Dell 8.1 pro,so still no issues right?

That depends on the hardware compatibility. Since it is Windows 8, Windows should have drivers for it.

You can do an upgrade fro Windows 8.1 Pro to Windows 10 Enterprise only if your system came  Windows 8.1 Pro factory Installed. if it did not come with the pre-installed, it will reject the license of Windows 10 Enterprise.

Surely incorrect. zvitam, what makes you think it will? No hints here that it cares: https://docs.microsoft.com/en-us/windows/deployment/upgrade/windows-10-upgrade-paths

Well I have learned it the hard way...

We had a bunch of PCs which appeared to originally came with FREE DOS and had aftermarket Windows installed.

The KMS server identified that there is no Windows License in the BIOS and rejected these PCs.

Well, take a MAK and it works.

Just tried to run an inplace upgrade from 8.1 pro to W10 enterprise and it says it can't keep any of my apps ,only files.
Says it's a  different OS.

So anybody got any suggestions?

It must have some reason for not keeping apps, so make sure you have your application files, CD's, whatever, let it keep your files and let it install.

This is pretty generic office 2013 ,adobe reader ,etc.
I've got an 8.1 enterprise key ,let's see if it coughs up a hairball too.

As a alluded to ,nothing straight about M$ upgrades.

It could be a driver issue causing the problem.

Update BIOS, Chipset and Video drivers and try upgrading again.

8.1 pro (as you could read in my lined MS upgrade paths documentation) is upgradable to 10 enterprise while keeping files and settings and I have done that.

"Says it's a  different OS" - please share the exact wording.

You get a 3 choice dialogue radio button box.

1.To keep your apps and settings is greyed out.
2.To keep your files is not.
3.The third is do not keep files.

Make sure you have a complete backup and do a fresh install.

Look, when asking  for the wording of "it's a different OS", I hope to get that wording. We already know that you are being sent to 2.

Running the 8.1 Ent upgrade and it seems to be working.

Then from there to Windows 10.

As I said ,nothing about M$ is ever straightforward.
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There is probably something about your machine. Install Windows 10 and reinstall your apps.  

I have upgraded numerous machines without issue

Look, you are on 8.1 enterprise and the reason setup thinks you want it to go to a different edition (which your setup medium holds as well) is because there is a key embedded in the machine's bios and it is picked up automatically by setup. There is no other explanation.
To make the machine use the key that you want, modify ei.cfg and PID.txt as shown in https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/windows-setup-edition-configuration-and-product-id-files--eicfg-and-pidtxt

Upgraded to Ent 8.1 no issues.

If you can't go from a like product to a like product,then what's the point of it being an enterprise product ?

I'm at a tech ed next week in SF,maybe somebody up there has a clue.

I have a customer with a special app that is very sensitive to forced patching and the long term enterprise build seemed like a good path to prevent the forced upgrades.

Tried just an upgrade to W10 pro and got the same thing.

Try doing a fresh install of Windows 10 - that is what I suggested above. I am not sure there is much else you can do.

"Tried just an upgrade to W10 pro and got the same thing." - then the key embedded in your bios will be suitable for win10 home. Just follow my advice.

Got a call into M$ support.
We'll see what's up shortly.

Really, that's what MS told you? And you tried the suggestion I made and modified ei.cfg and added pid.txt?

What a miserable experience.
Tried to upgrade from 8.1 to 10.
Kept on crashing.
M$ dialed in and due to phantom devices would fail the upgrade.
Had to use a tool called DevNodeClean OS before it would work.

Just an FYI ,the 10 upgrade broke the Epson wireless projection utility I was using on a Toshiba laptop.
Gonna roll back to 8.1.
Nothing but problems.

Being burned more than once by my friends at M$,I had cloned the disk before I did the upgrade.
I couldn't do a rollback as you no longer have 30 days to do so only 10.

So boys and girls I put back in the old 8.1 drive and everything now works again.

Thank you Uncle Satya for another couple of hours wasted time.

Inplace upgrade not possible with W10 LTSC Enterprise,must be clean install.