I can't get rid of this annoying little program.

[whatthefunk]

You have of course tried to change the wallpaper?

[BlinkinCat]

And what if I don't have Conky installed but my wallpaper is still this ugly grey background? What then?

It would be really annoying but maybe a fresh install?

[Moose]

You have of course tried to change the wallpaper?

Dude, that was the first thing I did. -.-

[mcduck]

And what if I don't have Conky installed but my wallpaper is still this ugly grey background? What then?

Then make sure whatever program is supposed to draw the desktop for you is still running and configured correctly.

For Gnome (& Unity), the program in question would be Nautilus. Check that the desktop/background/draw-background is enabled in dconf.

(If you don't have dconf-editor enabled then you can running "gsettings set org.gnome.desktop.background draw-background true" in a terminal should do the job)

[whatthefunk]

You could also start a new user account and see if the problem persists there. this would tell you if the problem was local or system wide. My feeling is that its local so deleting the correct system file could reset the wallpaper and fix the problem.

[Moose]

I didn't make a new user account, but I logged in using the guest account and I had the same issue.

[BlinkinCat]

I didn't make a new user account, but I logged in using the guest account and I had the same issue.

If I was you I would try a new user account - it may show up something.

You can always delete it later as far as I know.

[groggin]

I purged it, and it did something. And how do I remove it from start up?
And would I have to go searching for EVERY file? :c

Sorry, I'm not good at this stuff

.
system>preferences>startup applications
- and no!

I searched "startup" and an application was shown, I opened it and conky wasn't there. So I'll just try editing the file manually when I get home.

i'm sorry, i should have said go to the menu button, then system>preferences and you'll come to startup applications, clicking that should bring up a dialog with most of the apps you have installed. if conky isn't there, clic [add] navigate to /usr/bin and perhaps you'll see it there.
g'luck mate

[Moose]

Okay, so I've re-installed it and uninstalled it more than once, and I still have this issue. I am 100% sure that Conky isn't on my computer anymore. I'll explain in further detail what happens:

1. I log in.
2. Everything loads
3. My wallpaper loads
4. 3 seconds later, my wallpaper disappears and is replaced by a white/grey background
(5. (I am using Gnome) when I open the activities menu, my wallpaper is visible in the background.
6. When I return to the desktop, no wallpaper.)

[dodo3773]

When I input your command, I got this:
<anthony 14310 13987 0 19:04 pts/1 00:00:00 grep --color=auto -i conky>

I typed the other command to kill it, and the white background still didn't disappear.

The output here says that conky is not running. It only shows conky as it related to you grepping it with ps. That is why you were not able to kill it. Your issue is coming from somewhere else. Did you do anything different to your system recently? Like update something or disable / enable anything else? Nautilus used to set the background in gnome I am unsure if this is still the case. You may also want to look into metacity settings or gtk3 theme settings if you haven't updated your system recently. But either way it doesn't look like it's conky unless conky is running under some different process name (highly doubt that).