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Application Compatibility and OS Version

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One of the issues that you may have when performing your application compatibility testing for your legacy applications to be moved to Windows 7 is the OS version.  Applications may query the OS version to determine how, or if to install.  Below is a chart provided by Microsoft on the different OS versions.

Operating System Version Number
Windows 7 6.1
Windows Server 2008 R2 6.1
Windows Server 2008 6.0
Windows Vista 6.0
Windows Server 2003 R2 5.2
Windows Server 2003 5.2
Windows XP 64-Bit Edition 5.2
Windows XP 5.1
Windows 2000 5.0

This may not be all that the application looks at.  Take a look at this data returned from the following PowerShell query.

Get-WMIObject Win32_OperatingSystem | Format-List *

The above PowerShell command will gather all the Operating System information on my Windows 7 client.  It then displays everything in a formatted list.  I highlighted the version number in the output below.

Status                                    : OK
Name                                      : Microsoft Windows 7 Ultimate |C:\windows|
FreePhysicalMemory                        : 1225908
FreeSpaceInPagingFiles                    : 3266376
FreeVirtualMemory                         : 4724380
__GENUS                                   : 2
__CLASS                                   : Win32_OperatingSystem
__SUPERCLASS                              : CIM_OperatingSystem
__DYNASTY                                 : CIM_ManagedSystemElement
__RELPATH                                 : Win32_OperatingSystem=@
__PROPERTY_COUNT                          : 63
__DERIVATION                              : {CIM_OperatingSystem, CIM_LogicalElement, CIM_ManagedSystemElement}
__SERVER                                  : JASON-PC
__NAMESPACE                               : root\cimv2
__PATH                                    : \\JASON-PC\root\cimv2:Win32_OperatingSystem=@
BootDevice                                : \Device\HarddiskVolume2
BuildNumber                               : 7600
BuildType                                 : Multiprocessor Free
Caption                                   : Microsoft Windows 7 Ultimate
CodeSet                                   : 1252
CountryCode                               : 1
CreationClassName                         : Win32_OperatingSystem
CSCreationClassName                       : Win32_ComputerSystem
CSDVersion                                :
CSName                                    : JASON-PC
CurrentTimeZone                           : -300
DataExecutionPrevention_32BitApplications : True
DataExecutionPrevention_Available         : True
DataExecutionPrevention_Drivers           : True
DataExecutionPrevention_SupportPolicy     : 2
Debug                                     : False
Description                               :
Distributed                               : False
EncryptionLevel                           : 256
ForegroundApplicationBoost                : 2
InstallDate                               : 20100824184042.000000-240
LargeSystemCache                          :
LastBootUpTime                            : 20110115075916.782644-300
LocalDateTime                             : 20110116141146.331000-300
Locale                                    : 0409
Manufacturer                              : Microsoft Corporation
MaxNumberOfProcesses                      : 4294967295
MaxProcessMemorySize                      : 8589934464
MUILanguages                              : {en-US}
NumberOfLicensedUsers                     : 0
NumberOfProcesses                         : 107
NumberOfUsers                             : 2
OperatingSystemSKU                        : 1
Organization                              :
OSArchitecture                            : 64-bit
OSLanguage                                : 1033
OSProductSuite                            : 256
OSType                                    : 18
OtherTypeDescription                      :
PAEEnabled                                :
PlusProductID                             :
PlusVersionNumber                         :
Primary                                   : True
ProductType                               : 1
RegisteredUser                            : Jason
SerialNumber                              : 00426-068-1063837-86057
ServicePackMajorVersion                   : 0
ServicePackMinorVersion                   : 0
SizeStoredInPagingFiles                   : 3985976
SuiteMask                                 : 272
SystemDevice                              : \Device\HarddiskVolume3
SystemDirectory                           : C:\windows\system32
SystemDrive                               : C:
TotalSwapSpaceSize                        :
TotalVirtualMemorySize                    : 7970052
TotalVisibleMemorySize                    : 3985976
Version                                   : 6.1.7600
WindowsDirectory                          : C:\windows
Scope                                     : System.Management.ManagementScope
Path                                      : \\JASON-PC\root\cimv2:Win32_OperatingSystem=@
Options                                   : System.Management.ObjectGetOptions
ClassPath                                 : \\JASON-PC\root\cimv2:Win32_OperatingSystem
Properties                                : {BootDevice, BuildNumber, BuildType, Caption...}
SystemProperties                          : {__GENUS, __CLASS, __SUPERCLASS, __DYNASTY...}
Qualifiers                                : {dynamic, Locale, provider, Singleton...}
Site                                      :
Container                                 :

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