[BUG] Vivaldi will not work when Torch Browser is installed
when you try to open up Vivaldi when Torch is already installed, it will give you an error message that it will harm your computer and only one or the other will work since the programs interfere with each other
Vivaldi is not harmful or malicious software. Otherwise, your problem reminds me of another thread here wherein the OP said clicking on his Torch shortcut would open Vivaldi. Try giving that a read and see if it helps you, or is even relevant to your problem.