Windows 10 may update


I have just updated to the latest May 2019 Windows 10 but now find that every time I walk away from my Laptop and try to resume it flashes a blue screen and tells me there has been a problem and restarts the computer. Error message is - BthA2dp.sys
Can any one help or tell me how to do a system restore.


That would appear to refer to a Bluetooth device driver. You may find something of use in this MS Community thread, especially if you are using Kapersky AV.