I know I have spyware or adware, but Norton, AVG, and Windows Defender don't detect it. How do

I have pop-up blocker enabled, and it's blocking pop-ups from websites, but I still get pop-ups, often with adult content, while I'm browsing sites that don't normally have pop-ups. I've run several full scans with the three programs I mentioned, but they all say that no threats have been detected. My computer has become somewhat slower since these pop-ups began appearing.

I know I have spyware or adware, but Norton, AVG, and Windows Defender don't detect it. How do I remove it?virus protection software

download and install these two free spyware hunters.

spybot S%26D

ad-adware (by lavasoft) SE Personal

I also like to use PC Tool's registry mechanic to clean up stuff - but the full version will cost you.

If you choose to install these products make sure you check for updates weekly to ensure maximum protection.

Have used all 3 products for years.

see below for links.

I know I have spyware or adware, but Norton, AVG, and Windows Defender don't detect it. How do I remove it?adware

Sometimes throwing your computer into safe-mode and then running the Anti-whatever software helps by shutting down processes that the content could be running under an this helps the software by being able to check these off processes. Then again, sometimes the solution it could be as simple as deleting all the cookies and temporary Internet Files which contain data in them.
sometimes those infections need other programs or other specific instructions to get removed. Those programs help with most infections, but for specific infections, you need to get further assistance from the experts.