You may want to download a free trial of NOD 32 or AVG FREE. They are really good. NOD has not missed any viruses in MANY MANY MANY MANY----- years!!!
You need to run these 3 essential programs to remove all the spyware on your computer.
If you do not have an internet security suit and only an anti virus
1. Run Malwarebytes Anti-Malware
2. Run a complete scan with free curing utility Dr.Web CureIt!
3. Run the anti spyware removal programs spybot or Superantispyware
Use Mozilla firefox or the google chrome browser for browsing unsafe websites
ThreatFire, features innovative real-time behavioral protection technology that provides powerful standalone protection or the perfect complement to traditional signature-based antivirus programs offers unsurpassed protection against both known and unknown zero-day viruses, worms, trojans, rootkits, buffer overflows, spyware, adware and other malware.
Install a good antivirus in your computer.
Keep your antivirus updated. If automatic updates are available, configure your antivirus to use them.
Keep your permanent antivirus protection enabled at all times.