Alarms - new, unaccepted autostart entry or process appeared.

When a new program appears in the autostart, or a new process (not yet accepted) appears, then the application will warn you. The program's tray icon will start blinking.

If, in this moment, you didn't installed anything, and you didn't open a program, then you should be suspicious about it and check it out.

Click the blinking icon to open the program's window, and look at the items marked red in both, the processes list and the autostart list.

More about accepting processes and autostart items.