*ahem*
The magic words
"Download Manager" will be mentioned, not once, not twice, but everytime somebody complains about corrupted files after downloading. GPG has had issues, not just with the old downloads section, but with files finishing before they're downloaded fully, so always use a download manager. I can highly recommend Download Accelerator Plus, but that may not be for everybody, so do a good search.
Hopefully, that'll provide the answer you need. Basically, re-download it, if it's still corrupted, use a download manager next time.
Everyone knows that million-to-one chances happen 9 times out of 10; indeed, it's a common requirement in fairy tales. If the human didn't have to overcome huge odds, what would be the
point? Terry Pratchett - The Science Of Discworld
GPGSL S5 Race driver for IED.