What a shame, no useful answer to this question.
I do have the same problem, and I do NOT have a Lenovo, but a Clevo laptop with Win7 64bit.
I never had any problems with TC on my XP computers, but under Win7 there seem to be some problems with the TC boot loader interfering with the Win7 loader. I don't have UEFI or any other special BIOS stuff.
I tried with several different TC setups (only AES, cascading AES-Serpent, with protected areas encrypted and without) and always end up at the same result: TC password is correct, then it says "booting...." and nothing happens. When pressing ESC right after the password prompt, Win is loading normally; really seems as if each loader independently is working fine, but together they don't.