Hi EducIT,
Your questions and concerns about the BitLocker activation on your computer are best handled by our team in TechNet forums. This is a home for IT professionals and specialists who can share their insights on getting answers for your concerns regarding how BitLocker gets enabled.
This security feature is not automatically enabled. It needs a user intervention when encrypting the files and it will give you a BitLocker recovery key. The method of how your device getting encrypted is stated here: https://support.microsoft.com/en-ph/help/4028713/windows-10-turn-on-device-encryption.
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