Checking Service Pack and DLL Versions

To identify the service pack level of your system, run the Windows NT Diagnostics applet in the Administrative Tools group and select the Version tab.
To check a DLL version number, start Explorer, locate the file, right click, select Properties, and click the Version tab.
To check the version of Microsoft Internet Explorer (IE), click Help About or right-click My Computer and select Properties. The installed version of IE is displayed below the NT build number.