Published Apr 24, 2026, 3:30 PM EDT Rob LeFebvre is an editor and writer focusing on consumer and enterprise technologies for a broad range of outlets. He’s been writing online for more than 15 years; before that he was a special educator for kids with severe disabilities. Rob has been an Editorial Director at Lifewire, a news writer at Engadget, and a senior contributor at Cult of Mac. He's written about PCs, Macs, mobile phones, and games, created newsrooms from the ground up, and has extensive experience reviewing hardware, software, and games across his career.  Sign in to your MakeUseOf account There are times when you might notice the Task Manager tab showing your RAM usage at almost full levels, with no obvious culprit in the process list. The graph may be moving, but it's not telling you anything useful.…