just type them in when your on normal game play (not quidditch)
You can search for them on Google and I'm sure there will be some ;)
For Lego Harry Potter, there is no PC demo.
I don't think there are any...tried alot, but nothing really worked... sorry
Harry Potter and the Chamber of Secrets cannot legally be downloaded. You have to buy the game and then install it on your PC.
You can not download "LEGO Harry Potter Years 1-4 for PC, you have to buy it.
You can't - cheats were removed in version 1.3 so the PC never had cheats.
Depends whether you bought the PC version.
No you can only play as Harry in Harry Potter and the Chamber of Secrets. You can play as Hermione in Prisoner of Azkaban.
Yes
find it
It came out in February
Lego Harry Potter years 5-7 come out in November 2011.