Bitdefender is not free.
You can download it from the link below.
There are a lot of places in order for one to find the Bitdefender online scanner for free. However, it is strongly recommended that one should check out from the main website of Bitdefender.
BitDefender offers a free 30 day antivirus software that allows you try it before you buy it. You will have to supply some personal information before you can download it.
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bitdefender 2009 full security or comodo
Yes, Bitdefender is free. you can download a free trail if you visit their Home Page, and they have the Total Security 2012 that now cost around $79.95 which you can also purchase at their official website.
To use the free on-demand BitDefender scanner you just go to their website and click on "Start Scanner". To use the purchased software you would have to follow the instructions with the product.
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you can download it using a bittorrent client and at any torrent site
AnswerMemory hog is a subjective term because what is memory intensive to me is not necessarily memory intensive to you. However, a number of users report major changes in system performance after installing BitDefender. If you are also seeing your computer slowing down then uninstall BitDefender and install another anti-malware program. I recommend Avast Free Antivirus. It is important to note your computer slowing down can be due to a number of issues not related to BitDefender.
There are many websites which offer free virus scanning. AVG offers free anti virus protection. McAfee and Bitdefender also have free virus scanners which one can download.
There are many choices when finding free online spyware removal. Some free products offer different features a few examples would be Spybot or Bitdefender.