Thank you. boguing.
Yes, have tried three different adaptors and plugged them into usb 1 and 2 ports but all same, same.
A net search shows many with the same problem and the opinion seems to be that MS have 'crippled' Bluetooth on W7 64 bit for reasons best known to themselves
. All very odd and hugely frustrating, especially when each of the adaptors were specifically stated to be "W7 64 bit compatible". Widcom similarly claim compatibility ... but it ain't !! MS 'help' is, as usual, utterly unhelpful
Greatly tempted to move back to XP.