General information

If your PC is running a Windows 10 edition you can check which version you have by Left clicking on Start, then Left clicking on Settings, then System, then About and checking the details there (e.g. Version: 1607 and OS Build: 14393.447).

For the latest information on Windows 10, see Windows 10 information update or Windows 10 update
Interesting article on running older Office versions on Windows 10: Running older Office versions on Windows 10

If your PC was still working when XP support ended on 8th April 2014, you may prefer to use one of the Live CD/DVD list of Linux versions to see how you get on with it.
If you are happy using it then you can install Linux on your PC from the running Live version.

Another excellent system, is the ReactOS download, based on previous versions of Windows.
The open-source project started in 1996, as a Windows 95 clone, which was continued in 1998 with the gradual addition of features from later Windows versions.
As of November 2016 ReactOS is considered alpha software (i.e. still in early development); although it is missing some features, many Windows applications are already working with it (e.g. Adobe Reader 6.0, OpenOffice etc).

IT Whizz uses and recommends  Linux Mint 19 and Linux Mint Debian