چون شما Windows Vista Home دارید
By default vista home edition doesn’t have group policy edition i.e gpedit.msc.If you want to use group policy edition in vista home edition follow this procedure.
Go to start—>Run—>Type Regedit click ok
Now you need to navigate the following key from left pane
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Lsa
Create the following DWORD value (if it doesn’t exist):
LmCompatibilityLevel
and set it to:
0 – Clients use LM and NTLM authentication, but they never use NTLMv2 session Security. Domain controllers accept LM, NTLM, and NTLMv2 authentication.
1 – Clients use LM and NTLM authentication, and they use NTLMv2 session security if the server supports it. Domain controllers accept LM, NTLM, and NTLMv2 authentication.
2 – Clients use only NTLM authentication, and they use NTLMv2 session security if the server supports it. Domain controller accepts LM, NTLM, and NTLMv2 authentication.
3 – Clients use only NTLMv2 authentication, and they use NTLMv2 session security if the Server Support it. Domain controllers accept LM, NTLM, and NTLMv2 authentication.
4 – Clients use only NTLMv2 authentication, and they use NTLMv2 session security if the server supports it. Domain controller refuses LM authentication responses, but it accepts NTLM and NTLMv2.
5 – Clients use only NTLMv2 authentication, and they use NTLMv2 session security if the server supports it. Domain controller refuses LM and NTLM authentication responses, but it accepts NTLMv2.