It could have lights you just might see them until the power is on.The keyboard doesnt have any lights like mine does.
Keep the packaging for the walmart one - you may be able to return it.
You really should have asked first.-Save money.
If the one that came with the computer does not have lights we could have got an adapter for your old one for about $2.00
It depends on how it was setup by HPi might have forgotten but does it ask me to set up the anti-virus when i turn it on and it loads, and i should say no?
Do not stress about it.
If it pops up and ask you to run it say no.
Do you have your log in details - username and password written down for PCHelp forum ( Do NOT Post them here) so you can log in on the new computer