This is usually more relevant when installing Windows 10 on older laptops. Some of these laptops have made the jump from XP to W10!
Most will not have on-board TMP capabilities, so override this requirement by using the local group policy editor:
run gpedit.msc
Computer Configuration >Administrative Templates >Windows Components >BitLocker Drive Encryption > Operating System Drives > Require Additional Authentication at Startup
Click Enabled option
Check that ‘Allow BitLocker without a Compatible’ is ticked
Click OK and close gpedit
Enable BitLocker on the laptop, as usual
In order to check on the progress of the encryption, run an elevated PowerShell instance, where you can periodically issue this command:
manage-bde -status C: