Please try the following Removal Guide:Remove EnhanceTronic Ads (Virus Removal Guide)
Please turn your Firewall,and Real time Scanning back on as it leaves you susceptible to infection.
I might add in addition, before running the (Removal Guide) Download/Install/Run McAfee Getsusp. Please enter your Email address under "Preferences" before scanning. This will add the Detections to the McAfee Database,for future Engine Versions/Dats. This Superb Tool can be found in the following Link: http://downloadcenter.mcafee.com/products/mcafee-avert/GetSusp/GetSusp.exe
Edited:By Catdaddy 9/21/2014
This appears to be some type of adware or malware and it is a nuisance to say the least. There is a suggested removal guide for it but I was not able to find it but will continue to look for it. I will get back to you soon.
I now see Catdaddy has responded to you with the guide I was looking for. I may have had an intermittent server issue trying to find it but in any event Catdaddy has got you on the right path to get rid of the problem.
Good Luck & Thank You Catdaddy
Moved this to Home User Assistance as a better spot for it.