How to Use Task Manager: What Each Tab Tells You
Task Manager shows which programs and background services are using your computer's resources. It is the first tool to open when the computer is slow or an app stops responding. This guide explains what the main tabs show and how to use them without making things worse.
Open Task Manager
On Windows, press Ctrl + Shift + Esc. On Mac, open Activity Monitor from Applications, then Utilities, or search for it with Spotlight.
Find a frozen program
Select the program in the Processes list and choose End task on Windows, or click the X button and Force Quit on Mac. Use this when a program will not respond. Save your work first if you can, because forcing a program to close can lose unsaved changes.
Read the main columns
| Column | What it means |
|---|---|
| CPU | Share of the processor the program is using right now |
| Memory | How much RAM the program holds |
| Disk | How much the program is reading and writing on the drive |
| Network | How much data the program sends and receives |
A single program using high CPU for a short time is normal, such as when you export a video. A program that stays high for a long time while you are idle may be a problem.
Check startup programs on Windows
The Startup apps tab shows programs that start with Windows. Disable those you do not need. Disabling a startup item does not uninstall the program, so you can turn it back on later.
Check performance on Windows
The Performance tab shows the health of your processor, memory, disk and network. It also shows the disk type and the speed of memory, which helps you see whether an upgrade would help. See how much RAM you need for more detail.
Watch out for unknown processes
If you see an unfamiliar process that uses lots of resources, search its name online before ending it. Some legitimate system services have unusual names, but malware can also hide in the list. If in doubt, run a security scan, as explained in what malware is and how to remove it.
Frequently asked questions
Is it safe to end a process?
Ending a user program is generally safe. Ending a system process can make the computer unstable, so avoid it unless you know what it does.
Why does Task Manager show high memory use all the time?
Windows and macOS use free memory to speed things up. High use is only a problem if the computer is slow or memory stays full with little free.
Use the details view for process names
The default view groups processes by app, which can hide the real program names. Switch to the Details tab on Windows to see the executable file names, and check the path if a name looks unfamiliar. This helps you distinguish a normal background service from something you did not install.
Restart services instead of the computer
If one service misbehaves, you may be able to restart only that service from the Services tool on Windows. This avoids closing your open work. Use it carefully, because stopping some services can affect printing, networking or security, so restart only what you understand.
Related reading
- What Is a File Extension and Why It Matters: What the letters after a file name mean, how file types open in different programs, and how to show extensions on Windows and Mac.
- How to Use a Password Manager: A Beginner's Guide: What a password manager does, how to choose one, how to move your passwords into it, and how to keep the master password safe.
- RAM vs Storage: What Is the Difference?: A plain explanation of the difference between memory (RAM) and storage (SSD or hard disk), with an analogy and tips on which one to upgrade.