mecanim example scenes could not decompress?

I had recently downloaded mecanim example scenes from the asset store but when i clicked import they say they could not decompress the asset.What should i do about this?

I had recently downloaded mecanim example scenes from the asset store but when i clicked import they say they could not decompress the asset.What should i do about thiS?

What are you using.

Windows or Mac

Make sure that its not a zip or rar file