Finding the correct driver for the Jieli AC4100 (often identified as a "Bluetooth Peripheral Device" or "Jieli AC4100" in Device Manager) can be tricky because Zhuhai Jieli is an OEM manufacturer that provides chips to various brands rather than selling directly to consumers.
You almost certainly a specific Jieli AC4100 driver. Use generic Bluetooth drivers, update Windows, or identify the actual hardware ID for a correct match.
If Windows loses track of the driver functions, restarting the background system service will refresh the connection. Press to open the Run dialog box. Type services.msc and hit Enter . Scroll down and locate Bluetooth Support Service . Jieli Ac4100 Bluetooth Driver
Many users buy cheap "Audio" dongles thinking they are general-purpose "Data" dongles.
Uncheck the box that says Click OK to save changes. Finding the correct driver for the Jieli AC4100
The Jieli AC4100 relies on the 2.4 GHz wireless frequency bandwidth. This spectrum is highly crowded. If your adapter is plugged directly into the back of a desktop tower, it may suffer from electromagnetic interference (EMI) caused by the computer's internal components.
This is the most common error associated with Jieli chips. It usually means the driver loaded but the hardware failed to initialize. If Windows loses track of the driver functions,
Windows frequently turns off USB and Bluetooth radios to save power, causing Jieli chips to drop offline. Open and expand the Bluetooth section.
Select from the category list if prompted, then choose Generic Bluetooth Adapter or Generic Bluetooth Radio .