why do i get a decompression failed notice for downloading zip files
I'm trying to download my marks for my class and they were posted in a .zip file. however in the downloads box it's telling me that 'decompression failed' and when I try opening it it cannot be opened because it 'is still being downloaded'. I used to be able to open the files, but I don't know what I did.
I'm new to macs, so it's challenging for me to figure out what the exact problem is, and then to find the solution.
Thanks for your time!
MacBook Pro, Mac OS X (10.6.7)