drivers of bluetooth usb dongle may be lost

Hello,

My Bluetooth feature doesn't work any more, in C.P. B.t.-browser, I see an empty page and my smartphone is not visible now, settings/properties/enabling detection/apply gives an error 'error in b.t. service' and 'the b.t. app. is not connected probably'; but the b.t. usb dongle is actually plugged in and the blue led is on, but I cannot see if the software connection is working.

The B.t. general driver in C.P. says 'working correctly' , RFMD/IVT 6.2.71.214 (2010-06-24); this latest driver was an update (DriverMax).

But previously the dongle was surely visible also in C.P./B.t-radio's: there was 1) Microsoft enumerator (driver) and 2) Silicon Wave Wireless Adpter (driver), now there is nothing visible about this usb dongle, so these specific dongle drivers are gone may be.

It's a B.t. 2.0 Tiny usb adapter of Digitus (plug and forget).

How can I get this b.t. usb dongle working again in the first place?

This is ok now, after some manipulations, trials and errors with broadcom-, anycomwidcomm- and microsoft bluetooth's and b.t. drivers it's working again.
In c.p. I have like before 1 post bluetooth-radio's (microsoft bluetooth enumerator + silicon wave wireless bluetooth adapter) and under network-adapters I have again 2 b.t. items also (b.t. pan #2 + b.t. rfcomm tdi #2) and the drivers are silicon wave wireless adapter 6.1.6002.18457 and sst boxone dongle 7.0.0.1 also may be important, are installed successfully. The b.t. wizard for sending files to the smartphone works fine, receiving does not work yet, but this is a fault probably in the smartphone itself (samsung star s5230) that for some reason still sees an old computername (no more in use after windows reinstall), this is visible with search directly from the smartphone, but is does receive files. Ok, solved for the pc part at least.