Thanks to White Falcon for pointing this out to me.
An article running in the January 2010 issue of PC Powerplay features a screenshot from the best person in the world, me.
To the right is a scan of the article by White Falcon. Here is the blog post in which the screenshot was taken from.
So today I noticed all of my touch buttons on my Dell monitor on, which should only happen when I'm near it.
I figured some dust was on it and activated the buttons or something, so I wiped my hand across the buttons. My monitor turned off and turned back on (as it does when switching input modes) and when it came back on it had a big blue box in the bottom right with an error saying, "No Composite Input Signal."
The rest of the screen was OK, I could still use my PC and switch to my Xbox and it was all good, except for this giant blue box in the bottom right.
So I went to Google searching for help.
I found a lot of people with the same issue, but nobody really had any idea of how to fix it.
I hopped in to the menu and played around for a while until I came across PIP settings. After a few minute I realised PIP stood for Picture-in-Picture (something I didn't even realise this monitor did) and it made sense that this big blue box in the bottom right would be for PIP. I hopped in to the PIP settings and turned it off and voila! The blue box was gone.
So rather than signing up to all these tech help services and posting the answer, I hope my strangely high google rank helps people find this answer
Mine is a 2009 model, so my menu/options may differ slightly from earlier/later models, but here are the exact instructions to fix this issue:
"I don't have the internet."
Contrary to popular belief, there is no magical "fix your poorly taken photo" button. If your photo looks terrible in your hands, it's going to look terrible when it's scanned.
"I thought you were giving me the Internet? How can you give me a webpage and not give me the Internet!?"