Absolutely agree, the damage has been severely done. What Microsoft has ADMITTED to is just the tip of the iceberg.
Everyone running Windows 10 has a computer system open to who knows. A user's browsing history may contain embarrassments which could be used against them at a later date. Of course, 'clearing' the collected data means that the data is probably hidden and not deleted.
The NSA must be very grateful for the browser history - I can understand the NSA needing to collect data but it shouldn't be done at the expense of everyone's privacy.