Vista. Recently I purchased an HP laptop with vista but the office 2007trial version was

Question

Recently I purchased an HP laptop with vista but the office 2007trial version was installed in it instead of full version. Now after entering the key for initiation of office 2007, it shows that the software will expire after 60 days.

 

My queries are :-

1.  Do i need to purchase this software or the HP dealer should provide it to me free of cost.

2.  Can office 2002 work instead of office 2007 in vista.