I ran into some problems when installing the latest update to Xamarin 4. Whenever the installer popped up it would crash right after loading up and say something like “Drive F: not found”.
Now, to be clear, the source of this problem is not necessarily linked to the Xamarin installer as this is known to happen to some installations going back all the way to Windows 7 and apparently it’s still happening now in Windows 10.
I don’t know what the exact reason is for this, but the good news is that I know the solution.
I suspect this has to do with bad unmounting of devices such as usb drives which makes msis confused when either trying to read the list of drives available or trying to pick a default. I would be very interested to hear from anyone who may be more knowledgeable on the matter.
In any case, I finally got around it by using the subst command. So here goes the solution:
Open a command prompt in Administrator mode. type :
subst [Drive letter causing the error]: “C:/Windows”
Now open the installer and try again.