adware

i am facing an adware problem with my browsers ( including avast free browser) those are coming from wonderland ads.I am having internet security premium version.I have scanned my entire system twice,but it is not showing any threats.What to do? please help me in solving this issue.

thank you

Attach your basic diagnostic logs. (MBAM, FRST and aswMBR)
Instructions: https://forum.avast.com/index.php?topic=53253.0