Sony s300 very slow at reading disc

This model runs slow on the reading process anyway. You might need a firmware update. I have had to update mine three time in the last two years. You can download it from the Sony site, but it is very important to follow the directions perfectly and having the proper burning software. It is an ISO image file so you would need a program to burn it on a CD not DVD as a image file and not a data file. Sony will send you the disc free of charge with instruction and that might be the easiest way to update if you call them.
http://esupport.sony.com/US/perl/swu-list.pl?mdl=BDPS300

1-877-244-9959