It happens. The war against Virus's, viruses, virii, is endless and ever changing. Sometimes, even with multiple virus scanners, a new virus can slip through. Yes, even on super-geek's computer. Anyone who thinks they are smart enough to catch every possible attack is just an uninformed fool.
There are so many paths of attack, especially on Windows. (you ARE patching, aren't you?). Mac and Linux users might be safer (not 100% though), but let's be real... percentage wise, these users a minority.
So, what does a geek do when infected, or suspects an infection? Well, besides the standard virus scanning, there is a powerful program that can really scrape the crap off your computer. MalwareBytes.org. I know, it actually sounds like one of those fake anti-spyware programs that pop up a virus warning so you install their software which is actually spyware. Oh... but it's not. Spyware actually looks for this software to try to disable it, because they know they can't hide from MalwareBytes.
From the MalwareBytes website:
Malwarebytes is a site dedicated to fighting malware. Malwarebytes has developed a variety of tools that can identify and remove malicious software from your computer. When your computer becomes infected, Malwarebytes can provide the needed assistance to remove the infection and restore the machine back to optimum performance.
Founded in 2004, Malwarebytes is all about helping users remove malware from their computers, however, we do not stop there. We also make sure your computer stays infection free. We have created a number of products that will assist you to keep your computer safe and secure without slowing it down.
Sure, you can download the free version. But after you see it get rid of things other scanners couldn't, you will be so grateful you will feel obliged to pay for it. $25 is a small price to pay for it saving your ass. Even you super-geekafied, know-it-all ass.