My Lumia 710/7.8 satisfactorily pairs via Bluetooth with my Dell Inspiron Win 10 laptop. However, the paired laptop is displayed as 'Not connected' on the Lumia.
I have read elsewhere that removing the pairing and repairing should sort out the problem, but despite doing this several times, I have been unsuccessful in achieving a connection.

Attempts to transfer files in either direction between the Lumia and the laptop have naturally failed.

Any suggestions to solve this irritating problem will be gratefully received.