Screen turned orange before forcing update?

Hi there,
I was just relaxing when all of a sudden the screen my iMac 21" running Mavericks 10.9.3, which was in sleep mode, turned on and was a solid bright orange for a few seconds.
After that, it started installing a Mavericks update which I'd kept telling to 'remind me tomorrow' - earlier today I selected 'tonight'. Are Macs able to force updates even when the computer is in sleep mode? I found this quite strange.
Also, when the update was apparently complete, there was an application icon in my Dock - looked like a hard-drive with a suit and bow tie - following a little search on google the app is apparently called 'Bowtie'. The icon was there for a few seconds before disappearing.
The reason I'm confused about this is that I've never heard of or installed the Bowtie app, and there doesn't seem to be any trace of it in my Applications, or when I perform a search. Any advice would be appreciated please?

Probably sounded funnier in your head.

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