system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do computers have to download and install software? What's the difference between the two and why can't it install as it's downloading?
gpt
One gathers the files, one applies it. Depending on what it is, if you started installing before you had all the pieces of the file, and something happened to the download, bad things could potentially happen.