I have bought two of these. Refurbished HP Compaq DC5800 Small Form Factor Desktop PC Intel Pentium Dual Core 2.0GHz (E2180), 2GB Memory, 80GB HDD, DVD ROM, Win7 Home Premium 64 Bit Neither of them will produce sound. On boot up I get an error message stating. "The SoundMAX audio driver did not load. You may need to re-install SoundMAX." I have tried re-installing the audio driver but to no avail. I would love and answer to this before I ship back another one of these. Does anyone know what I am doing wrong? Thank you so very much in advance!