If you were able to open Marie's computer ("
Words of Secrecy")
then on the "Desktop" there are a few icons you can interact with: "kitty.gif", a globe for the web browser and an envelope for the e-mail client.
Open the document with the text "kitty.gif". This will play an animated GIF of a cat. Achievement unlocked.
If you are going for the "
The Complete Picture" achievement
, then do not forget to interact with the following items on the desktop of the computer:
*** Spoiler - click to reveal **** ... the aforementioned "kitty.gif"
* open the e-mail client and read the top two ("2") e-mails (one from the principal and the other one with a photo
* open the web browser and browse the three ("3") tabs (one with kitty images, one with a gun website and one other website.