Act I - S.S.D.D.
After the weapons presentation, on the way to the Pit. The laptop is right next to the tower on the left.
Act I - Team Player
Before you exit the school, one of you companions will warn that someone might be inside one of the rooms. Inside you will find the laptop lying on the table on the right, behind some barrels.
Right after leaving the school, next to a taxi.
Act I - Cliffhanger
After captain MacTavish tells you go alone through the blizzard, go straight. There's a tower near the vehicle - climb up and you'll find the laptop at the top.
After getting to the hangar, before you go inside with the captain, head to the second hangar where two mechanics are repairing a plan. Smash the window and take the laptop from the barrel.
During the snow scooter fragment, around 1820 meters from the target. You will reach a small cluster of trees with a fence before it them. The laptop is in the middle, a little to the right (drive over it to collect it).
Act I - Takedown
Right after entering the favella, take the left street and you will reach some huts with a motorcycle inside. The laptop is on a table in the room to the left from the one against which the vehicle is leaned.
While getting up the stairs, you will pass a building with a ladder - take it up. The laptop is in the next room.
Not far from the last laptop. In a building with little wooden stairs by the entrance. In the second room, near the bed.
At the end of the chase sequence, in the building next to the burning car. Go down to the lower floor and you will find the laptop between the beds.