Hi,
Most of the time this happens on a slower computer and hasn't been power on for a week or so.
You probably have a few updates to do and it's taking a long time to download. You can open windows update and see what it says.
In task you can just stop the process if you want to stop the updates for now, but after a while, it will check for update again.
If not it might be a virus. Download malwarebytes, adwclaner and roguekiller to do a cleanup.