CPU can be changed, ram can be changed to 16GB max with 8GB in 2 slots, graphic card is solder on, hard drive is a 2.5 inch and wireless card can be changed

Removing dvd drive 1.00
Removing hard drive 1.25
Removing ram 2.55
Removing back cover 3.30
Removing wireless card 6.45
Removing heat sink 7.45
Replace and clean thermal paste 9.15
Removing CPU 11.00