Download Lenovo B490 Broadcom Bluetooth 4.0 driver. Export Control and EULA Use of any software made available for download from this system constitutes your acceptance of the Export Control Terms and the terms in the Dynabook end-user license agreement both of which you can view before downloading any such software. the Device Manager - BCM20702A0 Broadcom Bluetooth 4.0 BCM43142A0 Broadcom Bluetooth 4.0 USB Versions: 12., /, 12. Before you begin, here are some things to keep in mind. IF you don't have the bluetooth system installed on your computer, then try the latest wifi drivers from ACER. Select from the list drivers and components for your PC. The system requirements for Windows 8.1 and Windows RT 8.1 are nearly the same as the requirements for Windows 8if your PC is already running Windows 8 (or Windows RT), in most cases, you can get the free update to Windows 8.1 (or Windows RT 8.1). You can run them either by using the 'Run' command or by double clicking on the file in Windows Explorer.
IF you do use bluetooth, then go to the ACER web-sie and download the latest wireless and bluetooth drivers for your model and OS version from there, save them somewhere you can find them, and then run them to install them. then re-boot and see if you still have the problem. If it is, double click on it then select the 'Driver' panel and uninstall the driver(s). To find out if you have bluetooth go to 'Device manager' and it should be listed along with the other network adapters. IF you don't use bluetooth on your laptop, then i suggest you uninstall the bluetooth drivers and see what happens. It appears that on some Aspire computers there can be a conflict between the wifi and the bluetooth drivers when both are installed which causes disconnects similar to what you have described. A quick google for 'Aspire E14 wifi problems' suggests that you are not alone in having this problem.