If you're running into an installation error regarding "qwave.dll" on Windows 7, this article will walk you through the steps to fix that.
Let's get rid of this guy once and for all.
Step 1: Open up your start menu, and open computer manage settings:
3 Total steps here:
1. Open your start menu
2. Right Click the Computer tab
3. Click the "manage" option
Step 2: Open your Server Manager Features, and click "Add feature":
4: Click the "Features" Tab in the server manager column
5: Click the Add features option in the Feature summary window
Step 3: Open up and select Qwave in the Add Features Wizard:
6: Make sure the Quality Windows Audio Video Experience (Qwave) option is checked
7: Click Next
Step 4: Confirm Installation Selection:
8: Make sure Qwave has been selected in add features, and click Install
Step 5: Restart your computer:
9: A warning message will appear, this is normal. Restart your computer, and the change should implement, and Discord's installation should proceed as normal.