Programs and settings aren’t easily migrated to a new machine. For the most stable upgrade you’ll want to work from scratch.
Deleting items on your computer usually doesn’t wipe them clean. That’s an extra step.
The answer isn’t going to be too hopeful, though I do have a few small straws you can grasp at.
Incremental backups, in a practical sense, have a limited shelf life. I’ll explain why a full backup once a month is just about right.
Sure, you can cover your webcam with tape. But that won’t solve the real problem… you’ve got malware on your computer!
In a work environment all bets are off. If they’re looking hard enough, an employer can see everything you do on a work computer.