If you have a Surface Pro 2, you&re in for yet another runaround.
This time, the controversy surrounds the SP2 TPM chip & the chip that controls access to BitLocker and some other disk encryption technology.[ Further reading: 8 steps to install Windows 10 patches like a pro ]The SP2 shipped with an older, less-secure version of the TPM firmware.
If your machine has an older version of the TPM firmware, you see a Win10 Defender warning like the one in this screenshot.