Hello,
To assist you in a better way, please help me understand few things about the issue.
-- When exactly do get the WinRBU pop up?
-- What is the message that you get on the WinRBU window?
-- What is the system model?
You may try updating the BIOS from Dell Drivers and Downloads. Enter the service tag, choose the operating system and check for the latest BIOS update. Download and Install it, restart the computer and check the functionality.
**NOTE: Few things to ensure before updating the Bios is, the Ac Adapter should be plugged in. No other external peripherals should be connected to the computer. Please ensure that the Bios update should not be interrupted else it would damage the motherboard.
Please try the steps and write back to us would be glad to assist further.
