What's a reliable way of scanning for viruses on Macbook Pro

[Gardor]

Recently, my clipta.com toolbar seems to be malfunctioning. Whenever I want to download a video, it only allows me to download a small portion of a video - say, I wanted to download a 99MB video, I was only able to download about an eighth of it. I do not know what is happening, but I have also been experiencing from strange redirections - when I click on a link from a Google Search, I get redirected all the time to another page completely, and I have to go back and do it a few times before it works, sometimes. Could it be a trojan or a virus or something? - because all my troubles started, I think (but I'm not that sure) when I downloaded a .exe file. When I opened it, it didn't work. My security software detected a threat, and labelled it as "High" in risk level. Changes, according to my Internet Seurity Software, have also been made to my system files. It also seems that it may be a trojan horse. Could this be linked to my inability to download FULL versions of videos using my clipta.com toolbar? I use Mozilla Firefox (v. 3.5.5). Or could there just be a bug in Firefox or my clipta.com toolbar? I need a a solution to my problem. unlock iphone

[Kordakh]

Hello, I pull up Internet Explorer, and it lets me keep my home pages up for a couple of seconds and goes to blocked after a few seconds. It says blocked in the tab up at the top. Do I have a virus or what? How can I fix this? Please help! Thanks! [url=EASYSTRESSREDUCTION.INFO]stress reduction[/url] [url=IMPROVE-CONCENTRATION.INFO]improve concentration[/url] [url=DAILY-MOTIVATION.INFO]daily motivation[/url] [url=100PARENTINGTIPS.INFO]parenting tips[/url] [url=HOW-TO-STOP-PROCRASTINATING.INFO]how to stop procrastinating[/url] [url=OVERCOMESHYNESSEASY.INFO]overcome shyness[/url] [url=THE-POWER-OF-YOUR-SUBCONSCIOUS-MIND.INFO]the power of your subconscious mind[/url]