Ok, got File Explorer open. Now what?

Look for "My Computer" 

or a drive letter / description of the camera.

(sometimes, - unplugging the Camera, and plugging it back in, while you have File Explorer open - can help you spot its drive letter 'pop up' )

Yup, found 'This Pc' and it shows the computer's C: drive and a flash drive I have plugged in as D: and nothing more. I've unplugged the camera and plugged it back in. It plays a little tune while doing that.

What model of camera? Some cameras required you to set a "file transfer" mode on the camera. 

It's a cheap vodafone V85 that I only use to take pictures with.

Open a PowerShell window(1) and run the command "Get-Volume" with the camera connected and disconnected and see if there is any difference. If there is none the PC may not be recognising the camera.

(1) Hold down the Windows key and strike the r key. Type powershell in the text box that appears and hit enter or click OK.

It doesn't always show in the left column. Check everything on the right of the screen. Check all folders. Look for camera names, DCIM, and anything else you can't identify. Right-click Start and click Disk Management. If the camera is being seen it should turn up there. Don't change anything. This is just to test.

No difference between having it connected and not connected.

It is possible a drive letter is not being assigned when you plug in the phone.

Windows + R key to bring out the Run window. From there, type in “diskmgmt.msc” and press Enter. Then you will see Disk Management with all the disks and partitions listed. 

The bottom half shows ALL physical drives. Scroll through them to see if you can see your camera. 

That is what I just suggested above. If it is singing to you when you plug it in, presumably the computer is seeing it.

Is the phone unlocked. 
My sony xz2 dosn't show up as a drive untill I unlock it.

It only sees the hard drive and a flash drive if I plug it in.

It worked on windows vista no trouble. Sigh.