Running Arduino 0022 software

I am using windows 7 and I am not sure to open this zip file. Every time I try I get

C:\Users\Peter\Desktop\arduino-0022.zip could not be saved, because the source file could not be read.

Try again later, or contact the server administrator.

I know it's something simple and I hope someone can help.

Kind regards, Pete

Have you tried deleting it, and downloading again?

What are you using to unzip the file?

I don't understand why I don't receive a message telling me that the download didn't save in the first place. I don't usually open zipped files so I am more than likely doing something wrong. I also use Firefox if that helps.

I have tried deleting and downloading again...hasn't worked. I am using 7-zip