Slow and too many pop-ups

You may have downloaded an infected program.

Boot into safe mode with networking (F8 on startup). Download, install, and update Malwarebytes. Do a full system scan.
www.malwarebytes.org/

I would recommend using only 1 antivirus program. Malwarebytes is a good scanner, but the free version doesn't provide live protection. I would suggest uninstalling whatever other programs you have, and install Avira or Avast. They work well in conjunction with Malwarebytes.