Hi,
Welcome to Microsoft answers forum.
Please Click on Start, in the serach box, type Services.
On the Services Window, look for the DHCP Client, right click on it.
Select Properties,
On the DHCP Client Properties Window, click the Log On Tab, and select log on as 'Local System Account'.
Click on Ok.
You should be able to logon without using password.
Regards,
Azam - Microsoft Support.