What is a good antivirus protecion?

My computer is starting to freak out. I am getting SO many pop ups, a lot of porn ones. Do you know of any effective and free ways to get rid of this? thanks :)

What is a good antivirus protecion?antivirus scan

You need more than just antivirus protection to remove and prevent problems like those. If you need freeware security applications, you can choose from the following:

firewall: (listed in order of preference)

Comodo (http://www.comodo.com ), or

PC Tools (http://www.pctools.com/firewall )

Comodo recently released version 3.0 of its firewall, which adds an intrusion prevention component that's very effective, though it does take time for it to learn your system, and requires some ongoing attention by the user to make sure programs don't get improperly blocked. Comodo is one of the strongest firewalls available, freeware or commercial, according to the independent testing site matousec.com.

antivirus: (listed in order of preference)

Avira (http://www.free-av.com )

AVAST! Home (http://www.avast.com )

AVG (http://free.grisoft.com )

all provide realtime protection and automatic updates; all have ICSA and VB100 certification, but Avira has been among the highest rated in tests by several respected US and UK computer publications.

antispyware: (listed in order of preference)