Transfers files in the background using idle network bandwidth. If the service is disabled, then any applications that depend on BITS, such as Windows Update or MSN Explorer, will be unable to automatically download programs and other information. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!Background Intelligent Transfer Service (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\BITS!Start