interent explorer gone after harddrive switch?

[gospelguy]

i have a windows 7 laptop that had a crashed hard drive. i swapped it with another hard drive from another laptop. the computer works well. i did a factory restore on the replacement hard drive and the computer runs perfectly. problem is the internet explorer icon has now disappeared and the computer is not picking up any wireless connections suddenly. what happened to this computer and how do i fix it???
let me add more on the secondary issue. when i try to go down and see my connections, there are non at all. its as is wireless internet (or internet all together) does not exist on this computer suddenly.