Replying to Hard drive

So my fucking hard drive crashed in my laptop so I took it out and slaved it on my desktop to try to recover some files and installed a new hard drive.

Question 1: I cant seam to get my wireless card working. It just connects and then like 5 mins later disconnects. I have tried a ton of drivers and still not working. Also it says wireless network 5 now. I dont want it to say that.

Question 2; I downloaded I tunes and the set up file comes up with out and icon looking like a white square and I can access it. Whats up?

Question 3: Has anyone else had a hard drive crash after downloading music off a torrent site?

thanks.