Infected by system care anti virus

My computer is Infected by «system care anti virus»
i have install avast after being infected, it blocks the new window, but the scan does not seem to do the job, what can I do ?
Like it is said I have use the code to register to stop it from bloking all application, but how do I remove it, cannot find anything
Thanks

follow the guide here and attach (not copy and paste) the requested logs http://forum.avast.com/index.php?topic=53253.0

AdwCleaner
Malwarebytes
OTL
aswMBR

when done a removal expert will be notified and help you