FTP transfers corrupt the files I download

It ended up being a problem with Comodo Internet Security. It was not letting the "continual connection to the ftp server" stay connected. However the transfered continued, it still curopted. Either turn off Comodo Firewall, use ftps (Secure FTP, it has 100% integrety checking), or see if the solution ends up here at my comodo forums topic

"Some hypotheses, each more unlikely than the other:

Files already corrupted on the server,
Bad FileZila installation,
Bad sectors on your disk.
Bad network card or router (EDIT)

You can test each one in turn.
If none works, that's as far as my imagination goes."