Alex wrote:Try to temporarily disable Windows Defender and install FDM again. Let me know if this helps.

Still same.

Alex wrote:I think this is caused by some buggy antivirus. It can also be a malfunction of your hard drive.

Only AV I have is windows defender, and hard disk are pretty fine. I use bitlocker on every drive, maybe that's why?

Alex wrote:We can't fix bugs of the third party applications.

Which third party application?
I am using FDM 64 bit from this website only.