Are you here because you are having the issues with installer failing and or shooting out various errors causing the app from installing? Even though it is not intentional, there may be some issues that can cause the installation process to fail. Here are some common troubleshooting techniques that can help get you locked and loaded recommended by Discord App Support.
The first one is to close the Discord in the system and make sure all the Discord processes are terminated. Sometimes, there are stray processes that can hide in the system stray or the task manager. Please double check those. The second one is to delete the 2 following folders: 1. %AppData%/Discord and 2. %LocalAppData%/Discord.
In order to find those folders mentioned above, first of all, you have to hit the Start button + R and enter: %appdata% in the run window and hit enter. Then, type “%localappdata%” in the run window and press the Enter button. The next thing that you have to do is to find the “Discord” folder in both of those windows and delete it. If the OS tells you that the file cannot be deleted because it is still in use, then open up the Task Manager and terminate all instances of Discord there and in the start up tab.
In some cases, some extra steps such as restarting your system and reinstalling through http://discordapp.com/api/download?platform=win may be necessary. You can set the Discord application (%localAppData%/Discord/most recent version) in order to run as administrator and set compatibility to either Windows 7 or 8 (you can try both). Before anything, please make sure that all distances of Discord, including the browser version are closed out before trying the steps.
Aside from the methods to fix the Discord installation error mentioned above, there are some other methods that you can try. Some of them are running the update manually, updating everything on your computer, disabling the real time scanner on your respective anti virus, adding the Discord folder to your antivirus exceptions list, connecting to the hotspot on your phone, deleting everything Discord related and retry, and fixing the broken package.
If you want to run the update manually, here are the steps that you have to follow. The first thing that should be done is to navigate the folder on the computer by clicking the Libraries icon on the taskbar and pasting the location C:\Users(Name)\AppData\Local\Discord. Then, locate the updater file that has to be named accordingly, right click on it, and choose the Run as administrator option. The next thing that should be done is to select the version of the app that you had installed before the updating process engaged. If you are not sure about it, you are able to choose the older version. In the end, you can run the Discord app as admin as well and check out to see if the issue is gone. If the issue is still there even after following all the methods, you can try to seek a help from the expert.