-Internet Explorer 7- setup canceled

When I try to install Internet explorer 7, I receive this message:
[KB942615.log]
18.391: ================================================================================
18.407: 2008/01/23 08:24:48.796 (local)
18.453: C:\WINDOWS\SoftwareDistribution\Download\a6f6242cdf0ec852d894cf5c1d66e870\update\update.exe (version 6.2.29.0)
18.453: Hotfix started with following command line: /si /ParentInfo:37ea68e7be0abc4595424222c4f57298
18.797: Unexpected Error While Executing Line 1 ( Test.IE7InstallBlock.Section ) of PreRequisite
18.907: KB942615 Setup canceled.
18.907: Update.exe extended error code = 0xf00d
20.625: ================================================================================

what is wrong?

 

make sure you have your antivirus program turned off before you try to install IE-7.