The aacplusdecoder.w5s error indicates that this module has been unable to complete its task.  You may wish to determine if a virus is to blame: by finding the exact location that aacplusdecoder.w5s is running from on your PC, you can make this call.  However, it is not a simple matter of searching for a single file.

Often, encountering a registry-related error message such as this is only a warning that you have a cluttered and corrupted registry.  If you have failed to take steps to maintain your computer’s registry, you can assume this is the case.

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