Pop-up ads in web browsers can be permanently deleted by checking for malicious software related to the ads, resetting the web browser to its original state and reversing any changes to the computer by pop-up ads. Various utility software programs can assist in removing malicious software known as "adware," which displays constant pop-up ads.
In the Internet Explorer browser, the "Advanced" tab under "Internet Options" provides a button to reset the browser to its original state. Users should check the option to delete personal settings before hitting reset. In the Firefox browser, the option to restore to original settings is under the help menu and troubleshooting information. In the Google Chrome browser, the reset option is under advanced settings.