Password needed across the network?

i just installed OneCare (free trial) on my desktop and will do the laptop tonight but i'm curious: will the OneCare backup require a password when backing up across the network to an external drive on the desktop? I ask because the Windows backup feature by design does require there to be a user account at the destination computer to be password protected. I understand that logic but since these are my home machines i don't use passwords on the user accounts. I know i can just set up an extra account, but i would just rather not have to!