recive this error in the event viewer and i trate to fix.Event Type: ErrorEvent Source: ESENTEvent Category: General Event ID: 485Date: 1/20/2010Time: 7:24:44 AMUser: N/AComputer: INMEDIATA-FSDescription:tcpsvcs (3932) An attempt to delete the file "C:\WINDOWS\System32\dhcp\backup\old\new" failed with system error 5 (0x00000005): "Access is denied. ". The delete file operation will fail with error -1032 (0xfffffbf8). For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. Cesar Marcano

Seems you have got a DHCP server running on your server, could you please change the backup path of DHCP properties and check if it works.http://technetfaqs.wordpress.com