open regedit, navigate to:
HKLM\Software\Sony Corporation\Shared Info\AppDb\Vaio Perpherals Metadata
or if you have 64 bit Windows:
HKLM\Software\Wow6432Node\Sony Corporation\Shared Info\AppDb\Vaio Perpherals Metadata
you'll see that "version" field indeed have higher number than the update (1.1.0...)
change it to something smaller (e.g 1.0.1.12089) and close regedit
then run update
problem should be fixed
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adrian