Does BitLocker protect against file replacement attacks?

Hi! I'm doing a bit of research, and I was wondering if BitLocker, without opening the hardware and sniffing the decryption key from the TPM, is a good form of protection against things like, replacing utilman.exe with the cmd.exe for an Admin command prompt in the login screen. Is this a good protection? Thanks

submitted by /u/GBember
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from hacking: security in practice https://ift.tt/NW1wBuX