it will only download them if it needs them, so if it doesn't download them, and is not broken don't worry about it edit: i just installed the last batch of updates after reboot glass8 downloaded symbols for me also. i wonder what they changed in dwm this time Unfortunately for me, my pc boots with a black screen where as I can only see the cursor after the update. I've had this issue in the past from Aero Glass and other updates. Any way to manually get it to update the symbols? Are u using some alternative desktop theme? See Windows 8.1 cumulative patch: trouble with alternative desktop themes. It's an article from a german IT-News site translated by google.