How can I solve the Win7 family group?

            1. Press windows+R to open the win7 system running window, enter [gpedit.msc], press Enter to open the group policy;
2. Open [Expand Computer Configuration] —— [Windows in the Open Group Policy dialog box. Settings]——[Security Settings]——[Local Policies], click Security Options to find Network Security: LAN Manager Authentication Level;
3. Double-click to change the verification level to send LM and NTLM responses ( &), make sure to open the control panel —— network and sharing center, check whether the current network settings are working network or public network. If it is a public network, click the public network, change to the working network, and then restart the computer. Yes.