Hello again- I downloaded Marshmallow 6.0.1 from the Asus support site to my Zenpad S 8.0... Was a zip file and I downloaded it to my SD card then reinserted the card into the tablet. According to the "about" screen I now have 6.0.1 Marshmallow in the tablet. BUT- Here goes... The battery life is now WORSE than it was and it wasn't that good before. Now the tablet jumps from screen to screen without me even touching it- and then often just goes back to the home start screen. The Asus browser is more glitchy than it was before and keeps freezing and crashing. EVERY time I try and update apps in the play store the either sit there "installing" or it crashes. Is it a good thing to do a complete factory reset and just start over with this tablet? And if I do will I have to reinstall the zip file to try and reinstall marshmallow? I switched all the apps from SD card to internal memory and did a back up. I made sure all my photos went to my gmail photo app. Is it just me that's having so many issues with this tablet performing properly? I did use the proper download to match my tablet. PLEASE can anyone help me? I cannot get any straight answers from Asus as either I'm dumb or they don't understand what my issues are. I'm not real computer literate and just want this thing to work as it should. Thank you everyone.