I started using Dolby Home Theater in all my media PCs, some are Windows 10 others are Windows 7 - all are 64 bit, All are high level Gigabyte GA 990FXA UD7, two are Rev 1.0 ad two are Rev 3.0. All are running FX8350 CPUs with various Radio video cards. All worked prior to Dolby Home Theater 4. Ever...