malware hijacked search engine

I believe I have been infected by malware that has hijacked my search engine from Google to Yahoo. I have Gogle Chrome as my browser and all settings are set to have Google as my default search engine and all others but Bing deleted. any help out there? Why didn’t Avast detect this?

Attach your logs. (MBAM, OTL and aswMBR…!!)
Instructions: http://forum.avast.com/index.php?topic=53253.0

Asyn beat me to it :slight_smile: