I have after a dussin times failing with installing the newest toshiba bluetooth stack and finaly made it the 2 last times I recovered the system only to discover that even if I get rid of the microsoft drivers still not are able to have the toshiba drivers installed, like they dont recognise the device...
I read carefully your message and I’m little bit confused…
You said that you have recovered the system several times and set it to the factory settings.
From my point of view the Bluetooth should be preinstalled by factory settings and in such case no further installation is required…
I’m wondering if you have enabled the Bluetooth using the keys Fn + F12?
For older Toshiba notebooks the FN + F8 combination has enabled/disabled the Wlan and BT but for X870 the Fn + F12 is the right combination…
So enabling Bluetooth would force further BT actions ended up with enabled working BT.