Microsoft provided four examples, one of which clearly states that when entering text into any application, Microsoft may collect those typed characters. Why? So that the company can fine-tune the spell check and auto-complete features. Again, the Technical Preview is not ideal on machines used for everyday purposes unless users don't care about this "character collection."
Microsoft also revealed that when users open a file, the company collects information about the file, the program that opens the file and how long it takes to open said file. Microsoft claims that it uses this information to improve performance and more. Microsoft also collects information about programs that are installed -- including the device they are installed on -- and uses that information to determine and improve Windows 10's compatibility with those programs.
The company acknowledges that it may collect voice information if the customer uses voice input features, such as speech-to-text. This information will be used to improve speech processing, Microsoft revealed.
According to Microsoft, the user's contact information is only used to contact that customer, whereas the preferences are used to configure Program features. Under Disclosure of Data, Microsoft states that it will only share the data with the user's consent. Microsoft also states that the company will "share or disclose information about you with other Microsoft-controlled subsidiaries and affiliates, and with vendors or agents working on our behalf."
The bottom line is that individuals wanting to give the Windows Technical Preview a spin will need to be aware that their data and software usage may be used and provided to other parties. We've reached out to Microsoft for comment.