Here is how to check it through Registries:
The version information is found in the following key:
To check the registry, follow these steps:
On the Start menu, click Run.
In the Open text box, type regedit and then click OK; this starts Registry Editor.
In the Navigation pane, drill-down to the following path:
In the Details pane, look in the Name column for FullInstallVer and Version. Each of these keys will have corresponding version information in the Data column.
When finished, click Exit on the Registry menu to close Registry Editor.