Question about HP Tablets & eReaders
You can use a key reader software program to read the key, but without the Windows 10 installation image you are stuck. They are usually on a hidden partition on the hard drive? If not, because it is a Compaq and has a custom Windows image, you would have to buy a replacement from Compaq.
Number one tip, have computers made for you and buy a standard OEM Windows Operating System.
The fact it is a tablet makes things a lot easier, you just do a hard reset as described here.
Hard Reset HP ElitePad 900 G1
These videos suggest that the Operating System is Android and not Windows so you don't need an activation key.
compaq elitepad tablets 900 g1 tablet hard reset Google Search
Posted on Sep 23, 2018
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Posted on Jan 02, 2017
Had a good look around for you, the information you need is on a support page, but you need to register your product.
With it being a professional product, they will probably charge alot for a restore disc/additional support
Posted on Jul 20, 2010
The best thing to do here is contact product support at HP, they can get your key for you, in fact they are the only ones that can. Here is a link to the HP support site.
Use the "Contact HP" link at the top left of the product support page..
Posted on Nov 04, 2011
Here you find how to reset for different brands' of android.
Posted on Dec 09, 2014
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