Error 0x80070086

Value: -2147024762 | 0x80070086 | 2147942534

What does it mean ?

ERROR_IS_JOINED  
An attempt was made to use a JOIN or SUBST command on a drive that has already been joined.
Value: 134 | 0x0086 | 0b0000000010000110

Where does it come from ?

FACILITY_WIN32  
Provides a way to handle error codes from functions in the Win32 API as an HRESULT. (Error codes in 16 - bit OLE that duplicated Win32 error codes have also been changed to FACILITY_WIN32)
Value: 7 | 0x007 | 0b00000111

Other Errors for FACILITY_WIN32