Having passed all the Exchange 2007 Beta 2 install checks and installed ASP.NET x64, my attempt to install just the management tools on my Windows XP x64 system fails with the error: Copy Exchange FilesFailed Error:Installing product C:\Duh\Exchange2007\exchangeserver.msi failed. Fatal error during installation. Error code is 1603. Fatal error during installation Elapsed Time: 00:00:01 I cleaned out the temp directory and tried again with no success. Any suggestions?

Output from ExchangeSetup.msilog which appears to provide a little more info: Action ended 14:24:23: SetMshFolder. Return value 1.Action start 14:24:23: LaunchConditions.MSI (s) (68:44) [14:24:23:440]: Skipping action: CCPSearch (condition is false)MSI (s) (68:44) [14:24:23:440]: Skipping action: RMCCPSearch (condition is false)MSI (s) (68:44) [14:24:23:440]: Doing action: ValidateProductIDMSI (s) (68:44) [14:24:23:440]: Note: 1: 2205 2: 3: ActionText Action ended 14:24:23: LaunchConditions. Return value 1.Action start 14:24:23: ValidateProductID.MSI (s) (68:44) [14:24:23:440]: Skipping action: DIRCA_TARGETDIR (condition is false)MSI (s) (68:44) [14:24:23:440]: Skipping action: CA_REQUIRED_SERVER_OS (condition is false)MSI (s) (68:44) [14:24:23:440]: Skipping action: CA_REQUIRED_ADMIN_OS (condition is false)MSI (s) (68:44) [14:24:23:440]: Doing action: CA_REQUIRED_ADMIN_OS_ERRORMSI (s) (68:44) [14:24:23:440]: Note: 1: 2205 2: 3: ActionText Action ended 14:24:23: ValidateProductID. Return value 1.Action start 14:24:23: CA_REQUIRED_ADMIN_OS_ERROR.MSI (s) (68:44) [14:24:23:456]: Note: 1: 2205 2: 3: Error MSI (s) (68:44) [14:24:23:456]: Note: 1: 2228 2: 3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1709 MSI (s) (68:44) [14:24:23:456]: Product: Microsoft Exchange Server -- 1: Action ended 14:24:23: CA_REQUIRED_ADMIN_OS_ERROR. Return value 3.Action ended 14:24:23: INSTALL. Return value 3.MSI (s) (68:44) [14:24:23:471]: Note: 1: 1708 MSI (s) (68:44) [14:24:23:471]: Note: 1: 2205 2: 3: Error MSI (s) (68:44) [14:24:23:471]: Note: 1: 2228 2: 3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1708 MSI (s) (68:44) [14:24:23:471]: Note: 1: 2205 2: 3: Error MSI (s) (68:44) [14:24:23:471]: Note: 1: 2228 2: 3: Error 4: SELECT `Message` FROM `Error` WHERE `Error` = 1709 MSI (s) (68:44) [14:24:23:471]: Product: Microsoft Exchange Server -- Installation failed. MSI (s) (68:44) [14:24:23:487]: Cleaning up uninstalled install packages, if any existMSI (s) (68:44) [14:24:23:487]: MainEngineThread is returning 1603=== Logging stopped: 9/1/2006 14:24:23 ===MSI (c) (14:40) [14:24:23:487]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied. Counter after decrement: -1MSI (c) (14:40) [14:24:23:487]: MainEngineThread is returning 1603=== Verbose logging stopped: 9/1/2006 14:24:23 ===

May you have activated a group policy that hides your drives from the system or you have a bad drive letter (B: or so) that was the problem in my case (got the same error)greetings