Yeah... Actually, as someone who works in I.T. and deals with virus issues all the time?

I'd recommend the person with the problems download a copy of "Malware Bytes" (available at Malwarebytes : Free anti-malware download), but before actually running it, try booting their Windows PC in "Safe Mode" by pressing the F8 key when the machine is first powering on, before the first Windows "logo screen" appears.

It should give a menu of options including one to start in Safe Mode. (On a Windows 7 machine, I believe it's under an "Advanced boot options" selection you have to pick first.)

By running in Safe Mode, you tell Windows to only load the most basic set of drivers and things as it needs to run, vs. loading everything it normally has in its various files telling it what to run when it boots. This helps keep some virus and malware code from starting up, so it can't try to evade the scanner. THEN run Malware Bytes and do a "full scan" of at least your C: drive. Anything bad it finds, it lists in red print as it goes. When done, select ALL the stuff it found to remove and click the remove button.

That's usually the most effective way to get junk out of your machine, even if it already slipped past whatever regular antivirus program you normally run.