As a small business owner, I probably don’t qualify as an “enterprise”. However, I have serious concerns about the cloud-centric focus in Win10, as well as basic privacy issues. I could be sued for millions if client data were leaked by Microsoft.
You don’t have to be in the cloud if you don’t want.
That’s something all businesses both large and small have to deal with.
Personally, I think the Windows 10 privacy thing is a bunch pf hype generated by the paranoid and the anti-Microsoft crew here. Windows 10 doesn’t put any of your files in the cloud unless you copy them to the OneDrive folder (OneDrive is the cloud storage service that MS offers). Don’t want them in the cloud? Then don’t put the files there, just leave them wherever you store then now. It’s funny to hear all this FUD over it from people who routinely use DropBox or AppleDrive, both cloud storage systems, without a second thought.
The other area I have heard privacy concerns is over the Cortana search feature in Windows 10. While I don’t know all the details on this, I do believe that it does use your search history on the computer to try and improve search results. I do know you can totally shut that off.
If you have concerns, I would recommend that you check out this web page, which has links to lots of more info:
http://windows.microsoft.com/en-us/windows-10/windows-privacy-faq
And full disclaimer - I work for Microsoft (but everything I post is my personal opinion, and does not necessarily represent the position of Microsoft).
Last I checked, MS had around 80,000 employees, all happily using Windows 10, at work and at home. We wouldn’t be doing that if it were funneling our private info to some nefarious government org. JMHO.