The Register reports it's harder than it seems to stop Windows 10 data from flowing back to Microsoft. Users discovered that Microsoft continued to collect data on recent user activities even when the user has disabled the Activity History setting in the Privacy Dashboard.
It looks like this isn't a conspiracy by Microsoft though, but the result of a naming problem. It appears you need to turn off a setting at two places to actually stop the Activity history from being shared with Microsoft servers:
Marisa Rogers, Privacy Officer at the software giant, told us: "We are working to address this naming issue in a future update."
The slurpage collection is of course for your benefit and Rogers added that users have "controls to manage your data."
As for turning the thing off, Microsoft confirmed that, yes, you have to go to two places to actually stop your Activity History being shared with Redmond:
1. Under Settings->Privacy->Activity history: ensure the setting "Let Windows sync my activities from this PC to the cloud" is not checked
2. Under Settings->Privacy->Diagnostics & feedback: ensure Diagnostic data is set to Basic