When we had trouble updating your Kaspersky Anti Virus 7.0 or Kaspersky Internet Security 7.0 automitically,here is work around which done manually in a few steps:
Go to http://support.kaspersky.com/
Download av-i386&ids-daily.zip.
Note: av-i386&ids-daily.zip is for both Anti-Virus and Internet Security.
Follow the steps below the page.