The AVG secure search toolbar seems to appear out of nowhere and its annoying. Its annoying because you probably did not want it. AVG is a legitimate anti-virus software, but its search/homepage hijack is a bit pushy. I prefer a search engine without AVG on my Chrome browser.
Luckily, AVG allows you to get rid of it in a few clicks.
Select “Restore default new tab” in the far right-hand corner.
Upon selecting “Restore default new tab” you will be led to “AVG security toolbar settings”. Deselect “Show AVG Secure Search Box on new tabs in the browser” then select “OK”.
After that, you will need to close the application and reopen it.