I'm running Mathematica 14.0 on Windows:

$Version
$MachineType
(* 14.0.0 for Microsoft Windows (64-bit) (December 13, 2023) *)
(* PC *)

My institution has access to Mathematica 14.2 and will probably soon have access to Mathematica 14.3.

I would like to install 14.3 on my computer while still being able to use 14.0. Does anyone here have experience with having two MINOR sub-versions (like 14.0 and 14.3) of Mathematica on the same Windows computer? If so, did the two sub-versions peacefully coexist?

• In the past, I've had multiple MAJOR versions (like 9.0 and 10.0) of Mathematica on the same Windows computer and I experienced no problems.
• But I've never tried installing two versions of Mathematica differing only in the MINOR version number (like 14.0 and 14.3) on the same computer.

Here are some Mathematica-relevant directories on my computer (according to Mathematica 14.0):

$InstallationDirectory
(* C:\Program Files\Wolfram Research\Mathematica\14.0 *)

$BaseDirectory
(* C:\ProgramData\Mathematica *)

$UserBaseDirectory
(* C:\Users\myusername\AppData\Roaming\Mathematica *)

$HomeDirectory
(* C:\Users\myusername *)

$InitialDirectory
(* C:\Users\myusername\Documents *)

StringRiffle[$Path, "\n"]
(* C:\Users\myusername\AppData\Roaming\Mathematica\DocumentationIndices
C:\Program Files\Wolfram Research\Mathematica\14.0\SystemFiles\Links
C:\Users\myusername\AppData\Roaming\Mathematica\Kernel
C:\Users\myusername\AppData\Roaming\Mathematica\Autoload
C:\Users\myusername\AppData\Roaming\Mathematica\Applications
C:\ProgramData\Mathematica\Kernel
C:\ProgramData\Mathematica\Autoload
C:\ProgramData\Mathematica\Applications
.
C:\Users\myusername
C:\Program Files\Wolfram Research\Mathematica\14.0\AddOns\Packages
C:\Program Files\Wolfram Research\Mathematica\14.0\SystemFiles\Autoload
C:\Program Files\Wolfram Research\Mathematica\14.0\AddOns\Autoload
C:\Program Files\Wolfram Research\Mathematica\14.0\AddOns\Applications
C:\Program Files\Wolfram Research\Mathematica\14.0\AddOns\ExtraPackages
C:\Program Files\Wolfram Research\Mathematica\14.0\SystemFiles\Kernel\Packages
C:\Program Files\Wolfram Research\Mathematica\14.0\Documentation\English\System
C:\Program Files\Wolfram Research\Mathematica\14.0\SystemFiles\Data\ICC
C:\Program Files\Wolfram Research\Mathematica\14.0\Documentation\ChineseSimplified\
  System\ *)

It seems somewhat encouraging that $InstallationDirectory includes the major and minor version numbers (i.e., 14.0). What do you think?