Hi Susie,
Firstly, what amount of installed RAM is your BIOS actually reporting? If it
only says 2GB rather than 4GB then this would explain things. If it does show
4GB then you need to check your system configuration settings. Click the
start orb and type 'msconfig' into the search box and press enter/return.
After providing administrative credentials, the 'System Configuration'
dialogue will appear. Select the 'Boot' tab and click 'Advanced options...'.
This should open the 'BOOT Advanced Options' dialogue panel. One of the
options here is 'Maximum memory:' and you should ensure that the checkbox is
clear (unticked). Click 'OK' twice to close the dialogue boxes and a pop-up
will appear saying "You may need to restart your computer to apply these
changes...". Click 'Restart'. When your PC has restarted, it should report
the correct amount of RAM. Note that if you haven't already installed SP1
(links to the 5 language standalone versions below - select 32-bit or 64-bit
as appropriate) then you should do so as it corrects a bug which causes Vista
to show the incorrect amount of RAM.
Dwarf
32-bi
http://www.microsoft.com/downloads/...6D-5EBB-413B-89C9-CB3D06D12674&displaylang=en
64-bi
http://www.microsoft.com/downloads/...4B-32B2-41CC-BD8B-D71EDA5EC07C&displaylang=en