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invalid CRC error means like a bad file or bad extraction so try to
Download and install OBI 11G again, and also review the following additional steps.
1) Download the file again and ensure that the downloaded file size matches the file size expected.
If the file is not the expected size, you may want to try temporarily disabling anti-virus software or downloading on a UNIX machine first.
2) If you download on a UNIX machine, ensure that you FTP the file over to the Windows machine in BINARY mode.
3) Try extracting / unzipping the software using a different unzip utility from WinZip.
( for example: try 7-zip ).
4) When extracting, ensure that you have enough space to extract and also ensure that you have adequate temporary space. For the temporary space directory on Windows, review the environment variables TEMP and TMP.
5) Ensure that the Windows user has full Administration privileges.
if the same installer works in another machine then might be problem with your machine try to remove all the components and do a fresh install hope it might be helpful