So, my wife's computer was infected with the nasty Conduit virus. It switched her default search to Conduit SearchProtect, and had this other nasty feature of opening a new browser window every time she pressed a key on her keyboard. For example, in an instant messenger window, she'd type out the word "hello" and 5 Firefox windows would open up (windows, not tabs), basically rendering the computer unusable.
After 3 days of fighting and several hard drive wipes, I managed to get rid of it by flashing the BIOS (yes, this bugger leaves the hard drive and infects other chips). After it was all cleaned, I also switched out the keyboard for a fancy Microsoft one with all sorts of nice buttons on it. Worked great.
After a while, my wife went ahead and plugged in her old keyboard, since it's smaller (some Azza gaming one that came with her Cyberpower system on Newegg). Then, the symptoms returned sporadically. Sometimes it'll behave, and others it'll open up 20-something Firefox windows when she's typing.
So, it looks like THE CONDUIT VIRUS CAN INFECT KEYBOARDS. Don't ask me how, I don't know, but apparently it's possible. I'm going to be re-wiping the hard drives and BIOS and putting the Microsoft keyboard back in, and destroying the Azza keyboard, since apparently it's bricked. I just hope Conduit didn't infect the GPU or other chipsets as well.