Without more details I don't know - what "tells" you it's corrupt?
Is the zip corrupt when unzipping it or opening it? Is it corrupt when you run it?
Anyway the patch on the server is fine - many many people have downloaded it with no problems.
I have also downloaded it just now and it unzips fine.
So something is amiss your side.
Maybe a problem with your internet connection or PC.
Some ideas all suggestions welcome to the internet and PCs ..
Maybe it has not fully downloaded?
Check the file size is actually correct.
Check your drive has free space.
Try disabling Anti Virus until you have fully downloaded, unzipping, and running the patch.
Try scanning your hard drive for errors. Common on PC's.
Try downloading to a different hard drive.
Try asking a friend to download
Try using a different unzip tool, (try Winrar or 7zip - whatever you are not using currently).