Keep in mind that sometimes hardware in computers are made by the manufacturer, to only support WINDOWS. This means no matter what you do, you will never get it working in linux. This might be the case for your unit.
As we already know that you do have a bluetooth adapter, and while that message from bluemean usually means you don't have one, we know you do have an adapter, cause you were using it on Windows.
There is an easier way around this issue. Go to whatever your country uses for an online store, they seem to differ global wide. We here use Amazon. Pickout a well rated bluetooth adapter that supports linux. It will be an USB dongle.
Then all you gotta do is plug that sucker into an available USB port, and I can 99% gurrantee you, that Blueman is going to pick that puppy up and say, do you wanna turn it on? And your going to say, heck yes I do, click!
Open your Downloads folder, right click the Linux_BT_USB...tar.gz file and select extract here.
Double click into the newly created Linux_BT_USB... directory. Right click an open area and select "Open in terminal."
If the menu does not have that option for Gnome's file manager, then open a terminal with keyboard shortcut ctrl+alt+t
Paste into it: cd ~/Downloads/Linux_BT_USB_v3.10_20170802_8821CU_BTCOEX_20170516-1616
Let me know if you get an error that says includes a BUILD_EXCLUSIVE directive which does not match this kernel/arch. This indicates that it should not be built. Skipped.