If you are not sure, which version of the operating system is installed on your machine, click on:
The command line tool
systeminfo, which is included in XP and more recent versions of Windows, provides an exhaustive snapshot about important system parameter. Below is an example outout:
Microsoft Windows [Version 5.2.3790] (C) Copyright 1985-2003 Microsoft Corp. X:\temp>systeminfo Host Name: XYZ OS Name: Microsoft(R) Windows(R) Server 2003, Standard Edition OS Version: 5.2.3790 Service Pack 2 Build 3790 OS Manufacturer: Microsoft Corporation OS Configuration: Member Server OS Build Type: Uniprocessor Free Registered Owner: XYZ Registered Organization: GAMS Development Corp. Product ID: 69712-XXX-YYYYYYY-ZZZ Original Install Date: 7/6/2006, 12:44:48 PM System Up Time: N/A System Manufacturer: Microsoft Corporation System Model: Virtual Machine System Type: X86-based PC Processor(s): 1 Processor(s) Installed. : x86 Family 15 Model 33 Stepping 2 AuthenticAMD~1994 Mhz BIOS Version: A M I - 9000520 Windows Directory: C:\WINDOWS System Directory: C:\WINDOWS\system32 Boot Device: \Device\HarddiskVolume1 System Locale: en-us;English (United States) Input Locale: en-us;English (United States) Time Zone: (GMT-05:00) Eastern Time (US & Canada) Total Physical Memory: 1,023 MB Available Physical Memory: 700 MB Page File: Max Size: 2,473 MB Page File: Available: 2,202 MB Page File: In Use: 271 MB ...