1) Run: gpedit.msc
2) Find:
Console Root -> Local Computer Policy -> Computer Configuration -> Windows Settings -> -> Security Settings -> Local Policies ->Security Options
When you're there change the following policies
3) Microsoft network client: Send unencrypted password to third-party SMB server: Switch it to "Enabled".
4) Network security: LAN Manager authentication level: Select the option: Send LM & NTLM - use NTLMv2 session security if negotiated.
