How could i block or avoid unwanted bad websites while automatically entered due to browsing & view my mail?
If using Internet Explorer, go to Tools then Internet Options. You can block pop-ups there and also type in web addresses to block. Just click on the different tabs to see all the choices you have for browsing.
Okay, you need to do what? Do you mean block websites entered automatically as in Google Chrome, where you start typing a website you've been to before and it will finish it for you?