Hopefully we are all aware that we should exercise caution when downloading programs from the internet. There have been plenty of cases of malicious software being distributed via the web, and even legitimate programs being tampered with in order to carry an unexpected payload in order to compromise security on the computer which downloaded them.
To reduce the chances of downloading a poisoned program, the normal advice is to go to the original publisher and (for additional security) verify the download matches what the vendor said it should be, by checking the binaries are correctly digitally signed.
