Anti-Virus protection is your first line of defense from malicious programs that put your data at risk. If you do not have an anti-virus program get one now:
These anti-virus programs are all free for personal, non-commercial, use. All of them come highly ranked and any of them will protect you from the vast majority of threats. Once you have an anti-virus installed, take advantage of their automated update feature and set it to update at least once a week. Then set a schedule for the anti-virus to scan your computer.
If you are experiencing the following, your computer is infected and should be cleaned: