F-PROT Antivirus for Windows uses the SYSTEM account on the local computer to access the resources and objects it needs. The system account is a predefined local account that has full access to the computer. It acts as the host computer account on the network and has access to network resources just like any other domain account. On a domain network, this account appears as <DOMAIN NAME>\<machine name>$ and is included in the Everyone group.

To be able to update from the shared updated location on the network, each host computer account (the system accounts) must be granted read access to the share and the folder. On a domain network, this can be accomplished by giving Read access to the Everyone group. On a non-domain network this might have to be accomplished by allowing anonymous read access (null sessions) to the share and the folder. Below are a few examples on how to do this.

• Client and server are on a domain
• Give “Everyone” read access to the folder and the share.
• Client in a workgroup
• Windows XP/Windows Server 2003:
• Allow “Anonymous login” read access on the folder and the share or give “Everyone” read access and enable the local computer policy “Network Access: Let Everyone permission apply to anonymous users” on the server.
• Add the share name (not the path) to the list “Network Access: Shares that can be accessed anonymously” in local computer policy on the server.
• Windows 2000:
• Add the share name (not the path) to the NullSessionShares list in registry “HKLM\System\CurrentControlSet\Services\LanmanServer\Parameters\NullSessionShares”
• UNIX with Samba
• Set “public = yes” on the share in smb.conf