Search.US browser malware

I’ve searched all over this forum and found nada about this thing. I got it sometime in March 2013. Since then, I’ve gone to every help site I could Google and followed instructions, but it still pops up on some searches. I’m worried about how many viruses have been portaled in through this thing - apparently that’s what it does.

Yes, I used Malwarebyte’s AntiMalware; Yes, I used Search-And-Destroy; CC Cleaner won’t work on this machine.

A) Will reformatting my disk and reinstalling everything finally get rid of this horrible thing?

B) Can Avast “catch” it in the future?

Thanks!
MayDay3

Some info on this adware crap here: http://support.mozilla.org/en-US/questions/935168
Wait for a qualified removal expert to arrive here and help you…

polonus

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