This is how it was when I installed it to my pc:
Look in your system drive C:/programs etc.. (I can't remember it exactly but that should put you in the ballpark)
One will have an adb folder & inside that you'll see the program itself. You can add the path to the enviromental variables but I noticed if I put a shortcut to it on my desktop it would open from there and run.
Granted this was a couple years back but I've installed it on multiple computers changing path on some and shortcutting on others and it seems to run fine either way.
Shortcutting will not let you do the cmd+right click deal but it works fine. If you shortcut the whole folder you'll also have the platform tools folder where you place files to work with.
If I'm wrong somebody feel free to update me but that's how I got it running on my surface book
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fails to install (location not found 0 files copied)
Do you want to install ADB and Fastboot? (Y/N)y
Install ADB system-wide? (Y/N)n
Installing ADB and Fastboot ... (current user only)
Det går inte att hitta sökvägen.
Det går inte att hitta sökvägen.
Det går inte att hitta sökvägen.
Det går inte att hitta sökvägen.
0 file(s) copied.
Det går inte att hitta sökvägen.
Do you want to install device drivers? (Y/N)