Ive installed windows 8.1 on my pc and ive had a few issues. When i log in, everything seems to work fine but after a couple minutes my applications and files on my taskbar and desktop dissapear. Also, a "flicker" occurs every four seconds. This only occurs with 8.1 and not in 8. Despite the flickering i could open taskmanager and apparently when the flickering occurs, my cpu, ethernet and disk usage goes up a bit. it occurs in safe mode as well.