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This is one of our frequent question: How to determine which version(s) and service pack level(s) of the Microsoft .NET Framework are installed? You can use the registry information below to determine which version(s) and service pack level(s) of the Microsoft .NET Framework are installed.
.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
Name: Version, Type: REG_SZ, Data: 4.0.30319.0
4 - Full
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Full
3.5
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.5
Name: SP, Type: REG_DWORD, Data: 0
Service Pack 1
Name: SP, Type: REG_DWORD, Data: 1
3.0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v3.0
Service Pack 2
Name: SP, Type: REG_DWORD, Data: 2
2.0
HKEY_LOCAL_MACHINE\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727
1.1
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v1.1.4322
1.0 (on supported platforms except for Windows XP Media Center and Tablet PC)
HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{78705f0d-e8db-4b2d-8193-982bdda15ecd}
Name: Version, Type: REG_SZ, Data: 1.0.3705.0
Name: Version, Type: REG_SZ, Data: 1.0.3705.1
Name: Version, Type: REG_SZ, Data: 1.0.3705.2
Service Pack 3
Name: Version, Type: REG_SZ, Data: 1.0.3705.3
1.0 (shipped with Windows XP Media Center 2002/2004 and Tablet PC 2004)
HKEY_LOCAL_MACHINE\Software\Microsoft\Active Setup\Installed Components\{FDC11A6F-17D1-48f9-9EA3-9051954BAA24}
1.0 (shipped with Windows XP Media Center 2005 and Tablet PC 2005)