I have this problem too.
First I installed .Net3 Sp1. I then file the Logos4Setup.exe installed.
http://http://www.logos.com/4ways
The installation breaks off: "Setup was unable to download a required file."
The log file of logos will look like this:
Logging started: 2012-03-21T12:59:34Z
DateTime ThreadID Severity Category Message
2012-03-21T12:59:34Z 0x28 Info Module Initializing module (version 4.51.0.2057).
2012-03-21T12:59:35Z 0x28 Info Run Initializing with command line 'Y:\Downloads\Logos4Setup.exe'
2012-03-21T12:59:35Z 0x28 Info Run OS is not Vista or above.
2012-03-21T12:59:35Z 0x28 Info IsProcessElevated Process is elevated.
2012-03-21T12:59:35Z 0x28 Info SetLoggingPath Logging is enabled, logging folder file path set to 'C:\users\crossover\Temp\Logos Log Files\'
2012-03-21T12:59:35Z 0x28 Info GetWorkingFolder Working folder is 'Y:\Downloads\'.
2012-03-21T12:59:35Z 0x28 Info Run Default system UI language: 0x0807, Default user UI language: 0x0807.
2012-03-21T12:59:35Z 0x28 Info GetBestLanguageId No exact match for the Language ID '0x0807', checking '0x0007'.
2012-03-21T12:59:35Z 0x28 Info GetBestLanguageId No exact match for the Language ID '0x0007', using '0x0409'.
2012-03-21T12:59:35Z 0x28 Info Run No script specified on command line, downloading script.
2012-03-21T12:59:35Z 0x28 Info GetTargetFilePath Logos4Setup target file path set to 'C:\users\crossover\Local Settings\Application Data\Logos4\Install\Logos4WebScript.lbxdat'
2012-03-21T12:59:35Z 0x28 Info Run Downloading web script from 'https://s3.amazonaws.com/downloads.logos.com/LBS4/Installer/4.51.0.2057/Logos4WebScript.lbxdat', writing to 'C:\users\crossover\Local Settings\Application Data\Logos4\Install\Logos4WebScript.lbxdat'.
2012-03-21T12:59:35Z 0x28 Info Download Creating BITS background copy manager.
2012-03-21T12:59:37Z 0x28 Info Download Checking for an existing copy job from a background download.
2012-03-21T12:59:37Z 0x28 Info Download Creating BITS job with foreground priority.
2012-03-21T12:59:37Z 0x28 Error RunProgressDialog Failed to set the notify interface on the BITS job, result 0x80004001.
2012-03-21T12:59:37Z 0x28 Error Download Failed to download file, failed to retrieve copy job's error information.
2012-03-21T12:59:37Z 0x28 Info LogosMessageBox Displaying message box with title 'Logos Bible Software 4 Setup', message 'Setup was unable to download a required file.' and an error icon.
2012-03-21T12:59:38Z 0x28 Info Module Terminating module, return code 3.
Many thanks if someone could give a further tip ...