What can be said about this contamination
AudioToAudio toolbar is a likely unwanted application that is accountable for the browser modifications and random reroutes. A suspicious toolbar is not seen to be a malicious computer virus, nor will it harm your PC directly, even if it will install without your explicit permission, via freeware packages. Having said that, you could end up with a more severe infection because a questionable toolbar could expose you to malicious sites. A questionable toolbar was added to some free program and you missed it during freeware installation. A questionable toolbar’s main goal is to make profit which is why it generates so many advertisements. We strongly advise you eliminate AudioToAudio toolbar as quickly as possible, before it leads to serious trouble.