Use 7-Zip or WinRAR to extract the Neighbours From Hell 5 English Patch Fix to a temporary folder.

This is the most dangerous part of the hunt. Because Neighbours From Hell 5 is abandonware (not sold commercially), many download sites bundle the "English Fix" with adware, toolbars, or actual trojans.

Navigate to the game’s root folder. Copy the data folder and the main .exe file to a safe location (like your Desktop). If the patch fails, you can restore these.