Background Intelligent Transfer Service (BITS) is the service used by WSUS to download updates from Microsoft Update to the main WSUS server as well as from WSUS servers to their clients. Some download issues may be caused by problems with BITS on the server or client computers. When you are troubleshooting download problems, you should ensure that BITS is running properly on all affected computers.

To view the BITS service status, open a command prompt and run the following command:

sc query bits

If BITS is running, you should see output similar to the following:

SERVICE_NAME: bits

TYPE: 20 WIN32_SHARE_PROCESS

STATE: 4 RUNNING

If BITS is not running, you will see output like the following:

SERVICE_NAME: bits

TYPE: 20 WIN32_SHARE_PROCESS

STATE: 1 STOPPED

Often it is possible to resolve BITS issues simply by stopping the service and restarting it. Note that you must be logged on as a local administrator to stop and restart BITS.

To stop and restart the BITS service, run the following commands from a Command Prompt:

sc stop bits

then

sc start bits

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