Hi Morgan ,
You can scan your computer using the below mentioned tools.
AdwCleaner : It is a free removal tool for Adware (ads softwares)
Download link: https://toolslib.net/downloads/viewdownload/1-adwcleaner/
You can check and remove the unwanted applications from control panel.
Go to Control Panel (icons view) , and click/tap on Programs and Features and remove the applications you do not recognize.
Then open the C:\Program Files()X86) & C:\Program Files folder, open the program's folder and remove the remains of the applications .
Revert back if you need further help in removing the applications and if you still have any pop ups Thanks