This post is part of a series on the Old Calculator for Windows 10 replacement for the default Windows 10 Calculator App.
The Old Calculator for Windows 10 can be downloaded from Winaero:
The downloaded file is a zip file containing the installer:
Run the executable to install the app; select your language and click OK:
On the Welcome step, click Install:
Once the installation is finished, click Finish to close the installer:
With the installation finished, the replacement calculator app is available to use.