Milestone Analytics 2.2 BOSCH VCA - Manual (Page 5)

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To check which DirectX version is installed on a computer, click
Start, select Run..., and type dxdiag. When you click OK, the
DirectX Diagnostic Tool window will open; version information
is displayed near the bottom of its System tab. Should you
require a DirectX update, the latest versions of DirectX are
available from http://www.microsoft.com/downloads/.
XProtect Analytics works in tight integration with a range of
different Milestone products—some of which require a
particular version in order to work with XProtect Analytics—as
well as video content analysis software supplying the analytics
data. See Important Prerequisites below.