There are several ways to remove (or block) a banner from the browser. It all depends on the banner itself. Perhaps it is caused by the site you are visiting, or perhaps it is a virus that needs to be urgently eliminated.
Instructions
Step 1
The easiest way is to get rid of a random banner, there are a lot of them on mass websites. Usually the reason for the appearance of this banner is that old software for working on the Internet is installed. The most common reason is the browser. The fact is that the "standard" Internet Explorer included in Windows XP is completely unable to cope with blocking such a context. Therefore, the solution to the problem is to install an Internet Explorer update. If this does not solve the problem, then you need to install another browser (for example, Mozilla Firefox, Google Chrome, Opera). In the settings you need to add a separate item "block pop-up windows".
Step 2
If standard update tools do not help, then such banners must be blocked manually using special software. For the Mozilla Firefox browser, you can download an add-on called Adblock Plus (by the link https://addons.mozilla.org/ru/firefox/addon/adblock-plus). A similar utility allows you to block any interfering banner caused by the site. For other browsers, you need to look for similar banner blockers in add-ons
Step 3
Sometimes a banner appears with a virus or other malicious software. To correct this situation, it is necessary to carry out a full scan of the computer for viruses, and an effective means of protection. In this regard, the choice is wide enough: you can use the paid antivirus Kaspersky Internet Security or the free CureIt. If even after such a check the problem with the banner does not disappear, then you need to go to the address: The disk on which the operating system is installed - Windows - System32 - Drivers - Etc. There should be a file called "hosts". It must be removed and then rebooted. After which the problem should disappear.