VirTool: Win32/Obfuscator.xz is not really a virus, it is a program that confuses the code of authentication files. As a rule, they bet on unlicensed games. It is not difficult to get rid of it at all, just install one of the modern antiviruses, they all see it perfectly and set the parameter after the antivirus has found VirTool: Win32/Obfuscator.xz, since it is impossible to disinfect it with any of the antiviruses. Alternatively, you can manually delete the file with VirTool: Win32/Obfuscator.xz.

In some cases (if VirTool: Win32/Obfuscator.xz is running as an application), you need to go in safe mode, and then detect the file with an antivirus and delete it.