Thier's an answer for that,follow this link & read on.
http://support.microsoft.com/kb171793
If you want more info,go to : http://www.microsoft.com/technet Use search
& type in info.

"Jorge Cervantes" wrote:

When I checked BIOS, I confirmed that 4GB memory (2 GB x 2) was installed in
my computer.
But when I looked at System Properties, 2.98 GB of RAM was shown. Could
someone explain this discrepancy?
Jorge


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