Are you using any overlays or other hooks with CS:GO? Examples include <cue copy and paste> other capture programs, Razer Synapse (disable heatmaps), graphics mods like ENBSeries and SweetFX, and any type of software or utility that displays an in-game overlay like EVGA Precision, MSI Afterburner, TS3/Mumble overlays, Dolby Axon, Raptr, Overwolf, etc. If you use anything like this, shut it down. If you use D3DGear it must be uninstalled completely.