hacked by the (alleged) `amazon-security' scammers

[hput]

ubuntu-21.04
LXDE desktop

I fell for the scammers baloney for long enough, that they had the
opportunity to do what ever they wanted to my Windows 10 OS.

I have that machine unplugged from internet and shutdown currently.

I want to scrub the disks and reinstall back on those same disks.

Thinking about what and how to do it.

Maybe use the linux based SystemRescueCD. Although I'm not sure how a
real scrub is done or if that rescue tool has the necessary tools to
do it.

Anyone here that can coach me a little about how to go about getting
the disks securely wiped.