How can I permanently remove a spyware browser extension on Windows?

I've tried so much stuff, I ran tools, anti viruses, I've even went in the files and took out parts of the malware but the sucker is hidden in my computer somewhere, I'm about to do a new windows reinstall and delete everything, but I want to see if there's stuff I haven't tried, he's just lingering in my extensions on my browser and no matter how many times I get rid of it, it comes back smh
How can I permanently remove a spyware browser extension on Windows?
Post Opinion