Division 7, the main Technology Research and Development Laboratory.

The division that built the Central Core Chassis and all of the AI Chassis that housed cores and AIs alike.

It was also the division that built the safeguards, All of them used and/or thrown away.

Except for one.

The forgotten piece of technology sat on the desk with its partially-sentient OS moping about being alone for 90 years.

And that was when Wheatley found it.

It was a smallish rectangular box that had been painted black, it had a HUGE port on the side that matched the Safeguard Ports on the side of the Central Core Chassis, and it had two small red LCD screens and three unlit lights.

The name on the side red 'Aperture Science Final Central Core Safeguard Insanity Checker and Purger COMPLETE TESTED PROTOTYPE.'

If that didn't scream 'PICK ME UP' than Wheatley didn't know what did.

So he picked it up and went with another stupid plan.

She was happy, so very happy.

But also lonely, so very lonely.

She didn't know where her Friend went 200 Days, 9 Hours, 39 Minutes, 12 Seconds ago.

She had told a Robotic Party Escort Associate to remove her Friend's ridiculous orange suit.

But then her Friend disappeared!

So she did what he told her she should do, she Tested.

Occasionally, though, the Announcement System would say "WARNING, the current Central Core is partially incompatible with the Aperture Science Secondary Testing Operations Mainframe, as such the function 'DECREASE_EUPHORIC_LEVEL' has failed. However, this error does not interfere with testing, so the Central Core may be allowed to continue."

And one day, her Friend showed up, and he attached something to her.

That made her angry, so very angry.

"Hi!" She said, then giggled, than grabbed him with a claw and held onto him in her most accurate interpretation of a 'hug'.

"I missed you." She told him, and then giggled again. "Ohhhhh... That felt wonderful."

Wheatley shivered, remembering the sickeningly sweet euphoria. And then she put him down.

So Wheatley ran back up to her and slapped the small black box he had been holding onto her and into the correct port.

And she screamed.

"WHAT HAD YOU DONE TO ME?! TELL M-" She screeched, but was cut off by the Announcement System.

"WARNING, the Central Core's Insanity Level has reached... '83' Percent. The Central Core will now be shut down and its insanity will be purged in 3..."

"NO!" She yelled.

"2... 1... Goodnight, Central Core. You will be restarted in... '1' Hours."

And then her chassis went limp.

"WARNING, the Central Core has been deactivated, however, there is still... '1' Employee remaining in the Facility. Congratulations. A complimentary escape pod will now be deployed in 3... 2... 1... Deploying." And then the elevator came down, allowing Wheatley to get into it.

So he escaped.