LinuxQuestions.org - I think I want to prevent GRUB from starting automatically - Dual SSD machine (Windows 10 and Linux Mint)

So, I have this dual SSD Alienware 15 R3. As I mentioned in the subject, one drive is W10 and the other is LM19. Here is my problem...

If I push the power button and just stand back, Linux starts up. That's fantastic. I love that it's the primary OS. The problem is when I need Windows, I push F12 (Boot Option) when I see the Alienware logo and sometimes it does the 'right' thing (i.e. a blue screen pops up and it offers me Legacy or UEFI boot options. Under UEFI it says 'Windows Boot Manager'. I click that and W10 boots up) and sometimes it does the 'wrong' thing (i.e. it goes to GRUB and I'm only offered a choice of Linux Mint 19 or memory test). There's no predicting which will pop up (the blue Legacy/UEFI screen or GRUB). It seems totally random.

What I think I want to do is prevent Grub from ever coming on automatically but I'm not sure if that will mess something up or not.

Also, shouldn't I be able to set it up so that when GRUB does come I should see an option to boot into Windows or would that only be with a dual boot (not dual drive) machine? If I could make it do that, that would be the ideal solution.

Here are the hw/sw specs for my laptop:

Code:

mac@mac-Alienware-15-R3:~$ inxi -Fxzd

System:    Host: mac-Alienware-15-R3 Kernel: 4.15.0-36-generic x86_64

          bits: 64 gcc: 7.3.0

          Desktop: Cinnamon 3.8.9 (Gtk 3.22.30-1ubuntu1)

          Distro: Linux Mint 19 Tara

Machine:  Device: laptop System: Alienware product: Alienware 15 R3 v: 1.2.4 serial: N/A

          Mobo: Alienware model: Alienware 15 R3 v: A00 serial: N/A

          UEFI [Legacy]: Alienware v: 1.2.4 date: 01/25/2018

Battery    BAT1: charge: 70.2 Wh 100.0% condition: 70.2/99.0 Wh (71%)

          model: COMPAL PABAS0241231 status: Full

CPU:      Quad core Intel Core i7-7700HQ (-MT-MCP-) 

          arch: Skylake rev.9 cache: 6144 KB

          flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 22464

          clock speeds: max: 3800 MHz 1: 800 MHz 2: 800 MHz 3: 800 MHz

          4: 800 MHz 5: 800 MHz 6: 800 MHz 7: 800 MHz 8: 800 MHz

Graphics:  Card-1: Intel Device 591b bus-ID: 00:02.0

          Card-2: NVIDIA GP106M [GeForce GTX 1060 Mobile] bus-ID: 01:00.0

          Display Server: x11 (X.Org 1.19.6 )

          drivers: modesetting (unloaded: fbdev,vesa)

          Resolution: 1920x1080@60.02hz

          OpenGL: renderer: Mesa DRI Intel HD Graphics 630 (Kaby Lake GT2)

          version: 4.5 Mesa 18.0.5 Direct Render: Yes

Audio:    Card Intel CM238 HD Audio Controller

          driver: snd_hda_intel bus-ID: 00:1f.3

          Sound: Advanced Linux Sound Architecture v: k4.15.0-36-generic

Network:  Card-1: Qualcomm Atheros Killer E2500 Gigabit Ethernet Controller

          driver: alx port: d000 bus-ID: 3c:00.0

          IF: enp60s0 state: down mac: <filter>

          Card-2: Qualcomm Atheros QCA6174 802.11ac Wireless Network Adapter

          driver: ath10k_pci bus-ID: 3d:00.0

          IF: wlp61s0 state: up mac: <filter>

          Card-3: Atheros usb-ID: 001-003

          IF: null-if-id state: N/A speed: N/A duplex: N/A mac: N/A

Drives:    HDD Total Size: 3000.6GB (11.7% used)

          ID-1: /dev/sda model: WDC_WDBNCE0010PN size: 1000.2GB

          ID-2: /dev/sdb model: WDC_WDS200T2B0B size: 2000.4GB

          Optical: No optical drives detected.

Partition: ID-1: / size: 1.8T used: 328G (19%) fs: ext4 dev: /dev/sdb1

RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present

Sensors:  System Temperatures: cpu: 46.5C mobo: N/A

          Fan Speeds (in rpm): cpu: N/A

Info:      Processes: 253 Uptime: 15 min Memory: 3156.9/15910.0MB

          Init: systemd runlevel: 5 Gcc sys: 7.3.0

          Client: Shell (bash 4.4.191) inxi: 2.3.56