SBS 2003 event ID 1030 & 1058 repeatedly

Sbs 2003, after restoring a backup done on Acronis, comes up with errors, Computer Browser service stops itself then it Cant access \\servername\sysvol until after i restart.After i restart it can go for hours working fine & just decides to deny access to sysvol. even “restart” on DHCP becomes greyed out when this happens & clients cant get internet. Permisions on sysvol are set ok. Have confirmed settings on “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters & lanmanworkstation” are ok. Please Help!! Was on Symantec Endpoint (uninstalled using cleanwipe) now on Kaspersky 5.5 for exhange.