If you're talking about adware, you can use AdBlock, but you can also disable and clear out the problem using your browser settings. Here's a web page that goes into some detail about how to do this based on what browser you use: Adware: How to Remove Text Enhance
"Text Enhance (Text-Enhance) is a form of bundled flash adware (categorized as a browser hijacker) that attaches to internet browsers as an extension and cookie without user consent. ... Text Enhance is not a realistic in text advertising service."
If you want to stop all in-text advertising, even legit ads like infolinks.com, try this web page: Block Infolinks In-Text Ads
"Infolinks is a non malicious pay per click in text advertising platform (unlike Text Enhance). Infolinks is only integrated voluntarily into individual websites by the owner. Infolinks is not an internet browser hijacker, nor an internet extension."