Yes I'm using windows xp sp2 in the three computers. I've updated the three computers and also the directx and .net components. But with no luck

Here you have the last lines of ZuneInstall.log:
MSI (s) (EC:F0) [11:36:51:796]: Note: 1: 1609 2: Users 3: 1332
MSI (s) (EC:F0) [11:36:51:796]:
MSI (s) (EC:F0) [11:36:51:796]: Note: 1: 3
MSI (s) (EC:F0) [11:36:51:796]: Machine policy value 'DisableRollback' is 0
MSI (s) (EC:F0) [11:36:51:796]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2
Action ended 11:36:51: WriteRegistryValues. Return value 2.
MSI (s) (EC:F0) [11:36:51:796]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2
MSI (s) (EC:F0) [11:36:51:796]: No System Restore sequence number for this installation.
MSI (s) (EC:F0) [11:36:51:796]: Unlocking Server
Action ended 11:36:51: INSTALL. Return value 2.
MSI (s) (EC:F0) [11:36:51:796]: Note: 1: 1708
MSI (s) (EC:F0) [11:36:51:796]: Product: Zune -- Installation failed.
MSI (s) (EC:F0) [11:36:51:812]: Cleaning up uninstalled install packages, if any exist
MSI (s) (EC:F0) [11:36:51:812]: MainEngineThread is returning 1602
MSI (s) (EC:24) [11:36:51:906]: Destroying RemoteAPI object.
MSI (s) (EC:A8) [11:36:51:921]: Custom Action Manager thread ending.
=== Logging stopped: 14/11/2006 11:36:51 ===
MSI (c) (D8:5C) [11:36:51:921]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1
MSI (c) (D8:5C) [11:36:51:921]: MainEngineThread is returning 1602
=== Verbose logging stopped: 14/11/2006 11:36:51 ===