CAD2006 installation error

Users questions: [10*30*200707:50:01]===InstallationstartedonLIAOSHUJIANbyAdministrator===[10*30*200707:50:04][Info]W 4]Installationskipped:MSIRuntime3.0[10*30*200707:50:04]Installationstarted:.NETFrameworkRuntime1.1[1 0*30*200707:50:04]Command= support*dotnetfx*dotnetfx.exe *q*c: install*l*qb [10*30*200707:50:05][Err or: 1603] Fatal error during installation [10 * 30 * 200707:50:05] Installationfailed:. NETFrameworkRuntime1.1 [10 * 30 * 200707:50:05] I nstallationaborted [10 * 30 * 200707:50:13]
Experts answer: === === Installationended Microsoft.NETFramework1.1 , ca d try.
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