Try unzipping it to a folder on your desktop and then moving it to your runtime.

Or try a different unzipping program to see if it makes a difference. I know sometimes I'll get an error with winzip, only to be able to unzip with winrar.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi