arghs! uninstalled, reinstalled, and during reinstall, selected to use service pack ""Inventor2013_SP1.1_x64.msp"" same error. rebooted and retried again uninstall reboot then tried just basic install and then reboot and then applying service pack and still same error. tried install individual updates prior to 1.1 service pack and then applying 1.1 service pack and still get same error win7 home premium student version of autodesk inventor 2013 proffessional. nothing else is running, msconfig, disabling startup applications, made sure no antivirius or popup blockers are running. double checking i am in administrator mode. start->run->%temp%->enter key -> MSI4caa1.LOG ((log file of service pack 1.1 at an attempt to install)) Error 1328. Error applying patch to file C:\Config.Msi\PT5DA5.tmp. It has probably been updated by other means, and can no longer be modified by this patch. For more information contact your patch vendor. System Error: -1072807676 === Logging stopped: 11/3/2012 21:00:23 === searching autodesk website has not returned any other doings for this error.