DWMGlass.dll will fill up dwm.exe usage of GPU's dedicated memory after you open and close windows explorer (other windows might be included). 1) Install AeroGlass 2) Open Process Explorer, look at dwm.exe properties -> GPU Graph 3) Open as many Explorer windows as possible, then close them all 4) You'll see that the GPU's dedicated memory usage will not drop down. The expected behavior will happen if you uninstall Aero Glass. If you need proof, I can send you videos. However it's easy to reproduce and I hope there is a solution for this.