I was getting “Microsoft Bus Driver should be loaded in your system before installing Realtek HD Audio Driver !” error message while installing my Acer Aspire 5051 laptop audio driver on Windows XP SP3. Related information regarding this issue on Microsoft support site: http://support.microsoft.com/default.aspx?scid=kb;en-us;835221 Fix: [*] Download the hotfix at Microsoft here. The hotfix download link will be sent to…