Open the key below, and find the value of 'Users', if the value doesn't exist then create a new DWORD value. Change the value to equal 'FFFFFFFF' in hex and reboot. 

Key:[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters]
Value Name: Users
Data Type: REG_DWORD
Data:(ffffffff = unlimited)

 

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