Windows 8.1 and Windows Server 2012 R2, x64 checked symbols (Windows_winblue.9600.16384.130821-1623.x64chk.Symbols-IRM_SYM_X64CHK_EN-US_MSI.msi) - not working Windows 8.1 and Windows Server 2012 R2, x64 retail symbols (Windows_winblue.9600.16384.130821-1623.x64fre.Symbols-IRM_SYM_X64FRE_EN-US_MSI.msi) - not working LOG: [0x1BC4] DBGHELP: C:\AEROGL~1\symbols\uDWM.pdb - mismatched pdb ... [0x1BC4] DBGHELP: C:\AEROGL~1\symbols\dwmcore.pdb - mismatched pdb