Hi, I'm Robert and I'll be helping you with your computer question.
you should be able to log back into kapersky web page and sign in with your id and password ***** get the download again.
as for the printer i would need to know exactly what happens when you try to install it
that is usually a 2 step process where you first connect the printer to the wifi and then install it on the pc which should find it on the wifi network.
If you would like to pay a little bit extra i can get you my phone number and log in remotely to get everything working for you.