Issue & fix: I was having was graphics media accelerator crashing, resulting in: 1. Black screen lag on wake-up from sleep 2. Artifacts and other problems when opening apps 3. Desktop wake-up giving a graphics crash alert After scouring the web, it seems that the windows update for the GMA driver is causing the issue, and deleting it and reinstalling the ASUS driver from their ASUS Driver Package 2.0.0 fixed this (Device Manager-> Display adapter). This was not my idea, so I am linking the forum adresses here with the users' posts. Post describing issue and fix (poster m.smirnov): windows 8.1 lock screen delay ... -> How to disable auto driver update. -> Link to Asus Driver Package 2.0.0 (under utilities). Following the instructions I disabled auto-update for drivers. I verified that the current driver was MS's 126.96.36.1998. I uninstalled the display adapter driver with the "delete files" box checked. I had to reinstall ASUS's driver package and then restart. The first restart hung on Bios for a few seconds but subsequent restarts did not. I double checked the current display adapter driver was 188.8.131.527. Black screen wake-up lag, graphics driver crash alerts, and app artifacts are now gone for me.