I don't know if this post belongs in software or hardware. I have a problem with video playback being choppy whether on battery or ac power. It is choppy both being played from hdd and a dvd player and with all software(windows media player, vlc, cyberlink power dvd and media suite and also Nero media home). I also have an internal and external dvd player. I have an old dell latitude d630 with a w10 upgrade that other than the choppy video works great. The dvd's are the internal dell and an LG BD/DVDRW. I have a 2.0 ghz intel processor dual core with 4gb ram. I have increased the page file and changed hardware acceleration several ways and adjusted the display adapter settings according to intel's recommendations. Also I uninstalled/updated the display adapter and BIOS to latest version still available and changed the power settings. I am thinking of adding RAM to see if that will help.