wrapper.z5x hijecker

Hi,
even if i’m using
(and paying) for Avast protection
my browser google chrome (and maybe my computer) has been infected by the hijecker virus called " wrapper.z5x ".

With Avast tool for browser clean-up i can’t remove this malware.
Could someone help me with this problem?
Thank’you in advance for your help

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