Microsoft SQL Server Management Studio Object reference not set to an instance of an object. (Microsoft.VisualStudio.Platform.WindowManagement)

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SSMS fails with below error when you connect (or) explore the databases

SQL Server management studio might fail with below error  when you connect (or) explore the databases.
Error in SQL Server 2012
TITLE: Microsoft SQL Server Management Studio ——————————
Object reference not set to an instance of an object. (Microsoft.VisualStudio.Platform.WindowManagement)
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Error in SQL Server 2008 and SQL Server 2005
BUTTONS:
Unable to cast COM object of type ‘System.__ComObject’ to interface type ‘Microsoft.VisualStudio.OLE.Interop.IServiceProvider’. This operation failed because the QueryInterface call on the COM component for the interface with IID ‘{6D5140C1-7436-11CE-8034-00AA006009FA}’ failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)). (Microsoft.VisualStudio.OLE.Interop)

regsvr32 /u ieproxy.dll
regsvr32 ieproxy.dll

Cause
1. You would get above error if ieproxy.dll is not registered properly. Re register Ieproxy.dll.
C:\Program Files\Internet Explorer>regsvr32 /u ieproxy.dll
C:\Program Files\Internet Explorer>regsvr32 ieproxy.dll
C:\Program Files (x86)\Internet Explorer>regsvr32 /u ieproxy.dll
C:\Program Files (x86)\Internet Explorer>regsvr32 ieproxy.dll
2 .Net framework corruption (Repair Dot Net)
3. regsvr32 actxprxy.dll
4. If the problem persists after doing above steps then search the registry for class-id mentioned  in error message (in this error it is 6D5140C1-7436-11CE-8034-00AA006009FA). Once you find the class in registry explore ProxyStubClsid32 and copy the GUID in default key. Search for the copied GUID again in the registry and locate the DLL for which we are failing and register that Dll.