Which antivirus is most fast and effective?

i am currently using Mcafee but it makes my PC a bit slow especially during startup. Earlier i was using Panda which made things look faster but was an older version. i also dout if it is as effective as Mcafee and Norton. Is there any antivirus which is as effective as Mcaffee and Norton but does not effect the speed of my PC.

Which antivirus is most fast and effective?internet security

Dear there is no one is compare to NORTON or McAfee, You need to clean ur all system Once with McAfee then remove it and install "AVG-AntiVirus" its light in waight and efficiant to perform.

I think thats enough for u. Take it and enjoy. hope u r happy to know that.

Which antivirus is most fast and effective?network security

I recommend this antivirus.It is called antvir
Even what types of antivirus also dont show more different. This is because when startup, the antivirus program need to scan through those files, so if you need the startup scan fast, better remove/ delete those unnecessary files to ensure it scan less at startup.
As others have already mentioned - use AVG Anti-Virus.

Here is a link - you can download AVG (and many other free anti-virus tools and applications) -

http://www.vermontpcsolutions.com/tools_...