Dlls and shared system files.
For example, to terminate any antivirus it is enough to use instances of the system itself;
Whether steal data create an application that uses system services (almost all as suites ignore this);
In that specific case yours seems to be your custom. How to solve this action.
Another fact that may have occurred in your uninstalled and tried to do a clean, but some files and services were not changed correctly. It happens …