Some antivirus programs may flag it as a "Potentially Unwanted Application" (PUA), not because it is malware, but because of its powerful ability to terminate system-level processes.
After installation, you can simply right-click any "stubborn" file to see the IObit Unlocker option. Download iobit unlocker zip
IObit Unlocker is generally considered safe and is often cited as one of the few IObit tools that isn't overly aggressive with advertisements. Some antivirus programs may flag it as a