
Other programs may install themselves as a system service, so they’re running in the background even though you can’t see them. Explorer Plug-ins, Services, and More: Applications that add shortcuts to Windows Explorer’s context menu can make right-clicking on files take much longer if they’re poorly programmed.Worse yet, some computers may come with a considerable amount of unnecessary startup programs out of the box thanks to manufacturer-installed bloatware. Startup Programs: Examine a Windows system that’s slowed down and you’ll likely to find many additional startup programs have been installed, lengthening the boot process, cluttering the system tray with useless icons, and consuming CPU, memory, and other system resources in the background.

But why do Windows systems slow down over time? The main reason people reinstall Windows is that it slows down over time.
