@Tihiy I was wrong, the blank screen issue is still there, moving IE temp folder (log out) removes the lockscreen image +3 sec black screen -> slow login screen, then uninstalling SIB+ 1.5 results in a blank screen, F8 safe mode option "bcdedit /set {default} bootmenupolicy legacy" also blank screen, both laptops (2 liscences) running Nvidia cards (Kepler GTX 680M/780M) 120Hz screens. SIB+ installed (moved IE temp folder -> no lockscreen) restoring windows default theme and uninstalling uxstyle -> blank screen. Uxstyle installed (No SIB+) moving IE temp folder -> normal boot. - Moving IE temp folder -> log out. - SIB+ Uxstyle conflict. - SIB+/Nvidia drivers. Nvidia fixed the blank screen bug /3D Vision laptops with driver v326.01 no problems ever since, current v331.93. UxStyle v0.2.3.0 theme installed (Stealth) http://nighthawk-f22.deviantart.com/art/Windows-8-1-RTM-Dark-Aero-409206911 Thanks.