Regedit your way to: HKEY_LOCAL_MACHINE\\ SYSTEM\\ CurrentControlSet\\ services\\ msahci and create a new KEY called "Controller0" inside Controller0, create a new KEY called "Channel0" Now inside Channel0, create a new DWORD called "TreatAsInternalPort" set this value to "1" (this sets SATA port 0 (Drive C)to no longer show up in "Safely Remove Hardware")
Now, go back into the Controller0 folder again. inside Controller0, create a new KEY called "Channel1" Now inside Channel1, create a new DWORD called "TreatAsInternalPort" set this value to "1" (this sets SATA port 1 (Drive D)to no longer show up in "Safely Remove Hardware")
And so on, until all internal SATA ports are set to be treated as Internal. My motherboard has 6 SATA ports, so I have set Channel0 to Channel5.Credit
This has bothered me on some setups. This fix works.