Vista - Virtual address space usage problem in FSX

My configuration is as follows:
Dell Dimension E520, Intel VIIV CORE 2 DUO 6600 @2.4GHz, 2 x 1 Giga
DDR2, NVIDIA 8600 GT 256M DDR3, Windows Vista Home Premium 32 in
French.
I run automatically Windows updates and I am "up to date"
I fly FSX +SP1 + Acceleration pack (but NOT using DirectX10 preview)
and
I seem to have a Virtual address space usage problem so I just
downloaded and ran:

Windows6.0-KB940105-x86.msu

From Microsoft "Virtual address space usage in Windows game
development" 'Virtual address space usage in Windows game
development' (http://support.microsoft.com/kb/940105)

Then I got the following error:

"Windows update installer ... The search has finished" and in
another box
" *This update does not apply to your system*"

Is this true ? Why not ? What have I done to deserve this ?
What do I do next ????
Help !
Please !


--
Sir Jasper
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