I have several fillable forms with signature fields. Historically, for Windows 7 and 10 PC's, I have used Topaz signature pads and the Topaz GemSignPlus "plugin" to capture and "verify" signatures. Generally speaking, the user performs the following steps:
- Open the file
- Save As a different filename
- Fill out the form as needed
- Click the necessary signature field and wait for the Signature Capture dialog to appear
- Sign using the signature pad and click "Accept"
We recently began purchasing Acer Switch 12 tablets (Windows 10 x64) in order to cut back on staff needing to carry a laptop AND signature pad in the field to acquire signatures. On these new machines, the Signature Capture dialog does not appear when the signature field is clicked.
Troubleshooting steps taken include the following:
Make sure the signature settings are the same for a "working" device and the tablets.
Result -- no Signature Capture dialog (nor any visible evidence of the "click" action)
Instead of clicking the signature field on the form, tried the "Fill and Sign" icon.
Result -- The signature can be "captured" using the draw feature and then dragged to overlay upon the signature field. However, it does not "register" as signing the document the same way that using a signature pad does. For example, using that method, the user could either e-mail the "signed" document to, or simply open the "signed" document on another machine with a signature pad. But on the traditional machine, the user clicks the Signature field and the Signature Capture dialog box functions as normal. Which is to say, once the signature has been "Accepted" the document is closed for editing with the exception of any other remaining signature fields.
Pleas note that "buy additional software and/or services from Adobe is absolutely NOT an acceptable solution. And I mean that as respectfully as I can possibly make it 
Thanks in advance
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