Windows Task Manager does not allow you to kill multiple processes in a single click. At times it may fail to terminate a particular process or malware. These apps can help you in such cases.

KillProcess is a freeware portable application assassin of the extreme kind. It can terminate almost any process on a Windows machine, including any service and process running in the system. To select multiple processes, press Ctr key and select.
Even protected Microsoft system processes can be terminated. All of this can be done in the matter of milliseconds.
Ultimate Process Killer is another freeware portable tool which scans current Process in Windows computer with parent file path.
You can terminate process & delete the originating file. This tool will also help to delete the virus process with Parent virus file which is running the process.
If you have liked this post, you might want to check out some more, on topics like Task Manager.