I have used AVG Anti Virus, Zone Alarm Firewall, Spy-bot Search and Destroy a spyware killer for years. I have recently added superantispyware. They are all free for personal use and I have had no trouble with Viruses Trojans Hackers etc. I have just upgraded to AVG free 8.0 and all seems good so far. Zone Alarm allows a lot of personal configuration unlike the Windows Firewall. They can all be downloaded from http://www.download.com/ I also use Windows Defender from the Microsoft site. It is safe to use two anti-spy products but never use more than one A/V as it can cause conflicts. You should run A/V and anti spy weekly. Hope this helps

The easiest way to fix it is using Malwarebyte’s Anti-Malware (Download it, update it, do a full scan, and remove everything it finds).
I would also recommend the following programs to make the removal easier and make sure you don’t get infected again in the future:
Avira AntiVir Personal
Spyware Doctor Starter Edition

I highly recommend Antispyware Bot to you: http://www.antispywarebotonline.com
AntiSpyware BOT was created by the industry’s top professionals to protect your privacy and to ensure optimal system performance. By locating, eradicating and preventing malicious spyware infestations such as spybot parasites, spyware, trojans,adware, botnet’s, and other forms of malware, AntiSpywareBOT is able to provide its users with a spyware-free computing environment. AntiSpywareBOT users also enjoy the benefit of the software’s Active Protection technology, which automatically updates the AntiSpywareBOT software to ensure comprehensive, up-to-date spyware protection.
Download Antispyware Bot for free: http://www.antispywarebotonline.com

Adaware and Spybot. Get both, they’re both free and are GREAT!!!
http://www.download.com