Okay,
@Helene, let's try to get you fixed up.
Change your driver to be a Microsoft generic driver rather than one from Marvell.
1) Start Device Manager
2) Select your Marvell AVASTAR Bluetooth Radio Adapter
3) Right-click, then choose
Update Driver
4) Choose the second option:
Browse my computer for driver software
5) Choose the "
Generic Bluetooth Adapter", Next, then Close after it installs.
And again, let us know if this fixes your troubles.
By the way, the issue may be regarding compatibility with your router. The cause is not yours, however, but may be an oversight by Microsoft or Marvell engineers.
View attachment 9054