1.28 Pre-patch Public Service Announcement The new patch is on its way, and to make sure things go smoothly on your end, we recommend the following before patching to the latest upcoming version. If you have modified any of Blizzard's official files, you MUST back them up before patching. This includes any time you patch Warcraft 3, no matter the version. Specifics on the modified files: Blizzard is changing the patching system. The new system synchronizes the official blizzard files (mpqs, exes, dlls, w3ms, w3xs, etc), which means that if you modified any of those files on your computer, all of your changes WILL BE LOST WHEN YOU APPLY THE PATCH! The new system is like modern battle.net; the game will now check and sync your installation files with their servers, if your local files do not match they will be overwritten without warning. Please backup your installation if there is any data that you value. Spoiler: How to backup your Warcraft III Game Installation For Windows 1)Press the superkey(Windows Button) + e 2)Type in C:\Program Files(x86)\ 3)Find the "Warcraft III" folder 4)Right click and navigate to "Send to" and select "Compressed Folder" 5)Save the .zip to a safe location 6)Warcraft III is now backed up For Mac 1)Open a Finder Window 2)Press Command + Shift + G 3)Type in /Applications 4)Find the "Warcraft III" folder 5)Right Click and then click "Compress Warcraft III" 6)This will create "Warcraft III.zip" put this in a safe location 7)Warcraft III is now backed up Any other files, such as custom maps and custom files, will not be affected. It is also recommended to register your CD key with Battle.net if you haven't already, in case of losing keys. Lost keys will not be able to be recovered if not registered on the website. EDIT: Summary of what is important to know in what was mentioned through other pages of the thread.