Boot Camp icon not showing in Windows 10: Solution
Played around with this one for a while on several machines
If you have installed Windows 10 successfully but the BootCamp icon is not showing up, its probably the correct Support Drivers have not been applied for the particular machine
Solution: On the same machine that has Windows installed. In MacOS open boot-camp.
Un-tick all the boxes except "download Windows support files"
Make sure you have an empty correctly formatted that Windows can read (ie FAT) and clearly named USB stick (ie 10 Support) connected. Noting the name, brand and GB size ( don't use Kingston USB3 as they have known issues)
Progress through the Wizard to download the software on to your named USB stick.
When completed eject the USB stick
Reboot into Windows (using "Option key" at the start-up chimes)
Choose EFI drive option
Once windows has finished loading, explore the USB stick and click on setup
All the relevant drivers etc will be extracted into Windows, allow to complete and follow the dialogue boxes.
Reboot into Windows and Bob's your uncle
NB: Allow Windows to fully load, as the BootCamp icon shows up a little late
Pro-Tip: Disconnect all drives, sticks and back-up solutions at the very beginning of this process
Hope this helps
JimHill
iMac Line (2012 and Later)