Why does something rattle in the computer after veracrypt encryption?

Question

Encryption

I first installed Bitlocker on my disk, then I read that the specialists could somehow hack, and there were no precedents for hacking VeraCrypt (as I understand it).
I installed it, did everything according to the instructions, everything seemed to work out well, but now when I start the encrypted partition of the HDD disk (encrypted), I think it's him, it starts to rattle. What's the matter, can't it be used for encryption? I didn't find any information about this.