It could also happen if a virus checker blocked the file. The installer self checks for corruption prior to running, so the installer is 100% correct otherwise it would not install any files.
If you have no virus checker, run a check disc on your drive.
You would not be able instal dBpoweramp R15.1 either (32 bit) as it uses the same dll, the issue is with Avast, if your security software is blocking legitimate programs, then it is not doing its job.
It is a false error, there is no virus in that dll. These virus checkers are getting poor at detecting real viruses, as time goes on their detection rate drops, yet the false positive rate (as in this case) goes up. R15 of dBpoweramp triggered lots of false positives (8 months ago) as did PerfectTUNES r1.6, a poor showing....
The 64 bit version of mp3.dll will appear different to the 32 bit version of mp3.dll, even though they were compiled from the same code at the same time...
I have the same problem with Norton, which actually removes it after installation. It states that it is SONAR (heuristic). Reverted back to 1.5 with no problems.
I have managed to get Norton to accept it and it is now a trusted site. New version installed and working. I've also submitted a false positive report. Same goes for Asset and I've posted the same message on there.
Thanks
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