For example, assume that a Windows Server 2008-based or Windows Vista SP1-based computer has 8 GB of physical memory. Specifically, the tool never reports more than 4 GB of total physical memory. The Microsoft System Information (Msinfo32.exe) tool reports the incorrect amount of physical memory in a Windows Server 2008-based or Windows Vista SP1-based computer that has more than 4 gigabytes (GB) of physical memory installed.
The symptoms of this problem, as detailed by Microsoft is as follows: