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11.1 Build 7466 (Apr 18, 2007)
Its true that this hasn't changed a lot from previous versions.
WinZip had its day back in the Windows 3.11/95/98 days but WinRAR is my recommendation.
2007 (10.2.0.30) (Apr 18, 2007)
Very resource hungry making it slow, doesn't remove virus infections automatically, but points you to endless support pages which then tell you to download extra removal tools or follow 10-15 steps to remove a viral infection.
AVG is a free solution which is quick and does the job well, give it a try and find out how to increase the speed of your computer over Norton and save yourself some cash in the process.
22.214.171.124 Beta (Apr 18, 2007)
While older versions of KAV (version 5 for instance) may have been a bit resource hungry, 6 certainly isnt and its only getting better.
If you want to criticize any Anti-Virus programs for being slow, look at Norton or Trend AV solutions.
5 Stars for KAV!