Check which .NET Framework version is installed

dir %WINDIR%\Microsoft.Net\Framework\v*

dir %WINDIR%\Microsoft.Net\Framework\v* /O:-N /B

Use the registry information below to determine which version(s) and service pack level(s) of the Microsoft .NET Framework are installed. 

To do this, following the steps below:

1. Click Start, type regedit in the Search programs and files box (click Run and type regedit in the Run Dialogbox in Windows XP), and then press Enter.
2. In the Registry Editor, locate the Registry Key Name in the table below and check the value for the related .NET Framework.
   
    

    

   
   
   
   
    

    

   .NET Framework	Service Pack Level	Registry Key Name	Value
   4 - Client	Original Release	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Client	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Client	Name: Version, Type: REG_SZ, Data:4.0.30319.0
   4 - Full	Original Release	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full	Name: Version, Type: REG_SZ, Data:4.0.30319.0
   3.5	Original Release	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5	Name: SP, Type:REG_DWORD, Data:0
   3.5	Service Pack 1	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5	Name: SP, Type:REG_DWORD, Data:1
   3.0	Original Release	Follow the deployment and detection guidance in this document: http://msdn.microsoft.com/en-us/library/aa480173.aspx
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0	Name: SP, Type:REG_DWORD, Data:0
   3.0	Service Pack 1	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0	Name: SP, Type:REG_DWORD, Data:1
   3.0	Service Pack 2	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0	Name: SP, Type:REG_DWORD, Data:2
   2.0	Original Release	HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727	Name: SP, Type:REG_DWORD, Data:0
   2.0	Service Pack 1	HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727	Name: SP, Type:REG_DWORD, Data:1
   2.0	Service Pack 2	HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727	Name: SP, Type:REG_DWORD, Data:2
   1.1 (on 32-bit operating systems)	Original Release	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: Install, Type:REG_DWORD, Data:1
   		HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: SP, Type:REG_DWORD, Data:0
   1.1 (on 32-bit operating systems)	Service Pack 1	HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: Install, Type:REG_DWORD, Data:1
   1.1 (on 64-bit operating systems)	Original Release	HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: Install, Type:REG_DWORD, Data:1
   		HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: SP, Type:REG_DWORD, Data:0
   1.1 (on 64-bit operating systems)	Service Pack 1	HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: Install, Type:REG_DWORD, Data:1
   		HKLM\SOFTWARE\Wow6432Node\Microsoft\NET Framework Setup\NDP\v1.1.4322	Name: SP, Type:REG_DWORD, Data:1
   1.0 (on supported platforms except for Windows XP Media Center and Tablet PC)	Original Release	HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}	Name: Version, Type: REG_SZ, Data:1.0.3705.0
   1.0 (on supported platforms except for Windows XP Media Center and Tablet PC)	Service Pack 1	HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}	Name: Version, Type: REG_SZ, Data:1.0.3705.1
   1.0 (on supported platforms except for Windows XP Media Center and Tablet PC)	Service Pack 2	HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}	Name: Version, Type: REG_SZ, Data:1.0.3705.2
   1.0 (on supported platforms except for Windows XP Media Center and Tablet PC)	Service Pack 3	HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}	Name: Version, Type: REG_SZ, Data:1.0.3705.3
   1.0 (shipped with Windows XP Media Center 2002/2004 and Tablet PC 2004)	Service Pack 2	HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}	Name: Version, Type: REG_SZ, Data:1.0.3705.2
   1.0 (shipped with Windows XP Media Center 2005 and Tablet PC 2005)	Service Pack 3	HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}	Name: Version, Type: REG_SZ, Data:1.0.3705.3

Recommended Deployment Detection

To detect the existence of a specific .NET Framework version regardless of the Service Pack level, or to detect a service pack level or a later service pack level of the same .NET Framework version, use the registry information that is listed in the following table.

Click here to view or hide detailed information

For more information about the benefits of the .NET Framework, click the following article number to view the article in the Microsoft Knowledge Base:
For more information about Microsoft’s currently supported products, visit the Microsoft Product Support Lifecycle website.

For more information about the Windows registry, click the following article number to view the article in the Microsoft Knowledge Base: