I have run a number of virus scans, run a specialized tool from Lenovo and followed instructions on some forums but now of those seem to review anything installed on my computer.
If you use CCleaner to clean out any unwanted programs on your computer that should do the trick along with Malware Bytes or Rogue Killer, Both of which are free and ones I personally use on clients computers. I wouldn’t recommend McAfee or Norton as there are programs out there today offering 100x the protection.