@Vesper
Unfortunately, As I got the Device with I think, V.1.0 641(not sure), dont have experience with 538. Will keep it in mind If I run intoo many problems.
How do I check for the corrupted internal memory? I did run Windows error checking on internal memory when I reformatted the SD card. Is there anything else I can do. That was one of the reasons I installed the update, to hopefully fix some of the problems.
However, over the last few hours, It hasn't crashed when opening images, so the firmware update might have helped there
As for PDF's, Can't seem to open any of the PDF's I've loaded on to it, even ones that were working previously. One step forward, two steps back.