How to disable SMB 2.0 …

For Windows 7
Open an Windows Command Prompt and enter the following to disable: - 
sc config lanmanworkstation depend= bowser/mrxsmb10/nsi
sc config mrxsmb20 start= disabled

To enabled, enter the following: –

sc config lanmanworkstation depend= bowser/mrxsmb10/mrxsmb20/nsi
sc config mrxsmb20 start= auto
For Windows Server 2008

Run "regedit" on Windows Server 2008 based computer.

Expand and locate the sub tree as follows.

HKLMSystemCurrentControlSetServicesLanmanServerParameters

Add a new REG_DWORD key with the name of "Smb2" (without quotation mark)

Value name: Smb2
Value type: REG_DWORD
0 = disabled
1 = enabled

Set the value to 0 to disable SMB 2.0, or set it to 1 to re-enable SMB 2.0.

Reboot the server.

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