Okay, before I start, I just want to say thanks to Natalie200931 for the idea. This story became to much work to continue (as in, my brain hurts from trying to come up with more ideas), so here's the epilogue to what would have happened sometime later.
Epilogue
Allana and Andrew went to the library alone, later that night. Allana typed in the pass code (Andrew had it memorized) and the computer shocked her. She couldn't move and Andrew couldn't pry her hands off the keyboard and she eventually was shocked to death. He took her home, but didn't go to Dean and Sam's room. He went to his own and Kendall opened the door for him. He laid Allana in her original bed and sat by the wall for the rest of the night, feeling guilty, with Kendall's head on his shoulder the entire time.
Dean didn't speak to anyone for three and a half months and Andrew clung tighter to Kendall then ever, almost never letting go of her hand for fear that he might lose her. Needless to say, Kendall didn't hack into any more computers with Andrew, Dean, or Sam around. They got rid of the spirit in the computer, burned Allana's corpse, and moved to another city.
The End
(A/N) I'm sorry I couldn't continue the story, but adding in details became more and more difficult to keep up with and I'm a details person. But I hope you got the basic gist of the story and I hope you enjoyed. THANKS!!!