1、click the start button and type secpol.msc in the search function.
2、Click on the dropdown menu and select "Send LM & NTLM - use NTLMv2 session security if negotiated". Apply the settings.
3、In the Advanced sharing settings page of Network and sharing center, you need to have it set as Work/Home profile. Try Make sure computers are the same workgroup for now (you can change it later)Enable network discoveryTurn on file and print sharingTurn off password protected sharingTurn on Use user accounts and passwords to connect to other computers
The other settings such as encryption I have set as use 128 bit encryption, you may need lower.
Please check related policies.
4、If a HOME version of win 7
1. Launch regedit from Start Search box.2. Find the following branch. HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa
3. Create a DWORD key under Lsa and set:
Name: LmCompatibilityLevel Value: 1
4. Restart.