Yes, and it's easy, however, most people rely on software to do the work for them which works great until they do stupid and expose themselves.

True anonymity is secured, and maintained, through conscious decision making.

get a VPN. Like 12bucks a month or more. Really fkn renInstall windows. I can assure you will screw this up. no problem. But I thing the issue is already installed software. So zero out your hard drive. K hard drives do not start as windows installed.That is not how windows works.
Do not install apps. When you install
programs, install the minimum of what you
want. Programs may ask for I call it extras. They are needed or wanted. Accomplishing this, people use what is called dban. I find it kinnda difficult.
K your computer should have a code I guess, for windows to install to. Assuming laptop, flip the thing over and just work with it. Assuming desktop on the right side should be a coa, I think.

The mission is to zero out the HD. Make it all 000000s

So reality, have a VPN,

Make your computer work, it will not work for you. It is not it's job.

Again encryption a good idea, I mean there are like spybot. So you are simply more I can call it crapware. So you are possibly installing more malware. I mean I like spybot. But, installing more stuff, to fix issues, does not make sense. I do have few programs, I am trying to explain this, spy apps are intended to do just that.

Thanks for the responses, however, rather than spyware, I meant something more specific: The apps that are used to monitor devices, like Auto-forward, and MSpy.

find settings, kinda scroll down, should figure it out, K learn local %appdata% it is OK to delete folder, it fou fk it up, folders should be restored

if you can find autoforward, related apps. Remove them. From add remove programs. Delete from local folder %apdatadata%

Kinda cool question. The idea is to not get spyware to be3gin with..

If you're so fucked that someone has root access to your device, there's no way of "hiding" your shit from them short of booting off another OS or wiping the boot device & reinstalling the OS from a clean source.

The former is pretty easy to do, just have a flash drive and download a bootable live Linux environment, then use something like Rufus to build a bootable USB drive.