Which installer have you down loaded?
May be the download is corrupted.
Last resort is to try the generic installer...
I downloaded Win64 installer and i download it twice but the same error appeared
i will try generic as your advice
how do you launch the installer? Can you navigate to the ".exe" file, open its parent folder in a command window as administrator and then type the executable name followed by hitting "enter" ?
I solved this problem as follows:
1. Extract "jdev_suite_121200_win64.exe" file into C:\jdev_suite_121200_win64
2. In cmd go to C:\jdev_suite_121200_win64\Disk1
3. Execute follow command:
C:\PROGRA~1\Java\jdk1.6.0_31\bin\java.exe (..your JDK..) -jar install/modules/ora-launcher.jar DISKCNT=1
Sorry for my english )