well Hello to you too.
Its a smiple thing to add a new drive, just have to check to see if you have a sata connection or the older ide. you may have both if so go with the sata. If you do have to install a ide drive you must make sure that the master/slave jumper is set correctly. you may also have to go into the control panel /Administrative tools/Computer managment / Storage/disk managment to format or assign it a drive letter it all can be done in under a 1/2 hour