The fastest way to open Task Manager in Windows 11 is to press Ctrl + Shift + Esc. It opens instantly, from anywhere, even when other apps have stopped responding.
Task Manager is also the best free tool in Windows for finding out why your PC is slow. This guide covers every way to open it, what each page shows, and how to use it to find and fix the programs slowing you down.
The quick answer
- Keyboard shortcut: Ctrl + Shift + Esc opens Task Manager directly.
- Other ways: press Ctrl + Alt + Delete, right-click the Start button or the taskbar, search for it, or run taskmgr.
- To find a slowdown: open the Processes page and sort by CPU, Memory or Disk.
- To speed up startup: use the Startup apps page to switch off programs you don't need at boot.
6 ways to open Task Manager
- Ctrl + Shift + Esc. The quickest way, and it opens Task Manager directly.
- Ctrl + Alt + Delete, then select Task Manager. Useful when your PC is struggling to respond.
- Right-click the Start button and choose Task Manager from the menu.
- Right-click an empty area of the taskbar and choose Task Manager.
- Search: select the Start button or the search box, type Task Manager, and press Enter.
- Run box: press Windows key + R, type taskmgr, and press Enter.
If Task Manager opens in a small window with only a list of apps, select More details to see the full view.
What each Task Manager page shows
- Processes: every app and background process, with how much CPU, memory, disk and network each is using right now.
- Performance: live graphs for your CPU, memory, disks, network and graphics. Select a disk to see whether it's an SSD or HDD.
- App history: how many resources each app has used over time.
- Startup apps: the programs that launch when you sign in, with a startup impact rating for each.
- Users: resource use for each account signed in to the PC.
- Details: an advanced list of every running process.
- Services: the Windows services running in the background.
How to use Task Manager to find what's slowing your PC
Step 1: Sort by CPU, Memory and Disk
On the Processes page, select the CPU, Memory and Disk column headers in turn to sort by each. Anything sitting at the top with high usage while you aren't actively using it is a suspect. A browser with many tabs open, a game launcher or a cloud sync app are common culprits.
Step 2: Check the Performance page for the bigger picture
Open Performance and look at:
- Memory: if usage stays near its limit during normal work, your PC doesn't have enough RAM for what you run, and Windows starts relying on the much slower drive.
- Disk: if the disk is at 100% active for long stretches, the drive is the bottleneck. Select it to see whether it's an SSD or an older HDD.
- CPU: constant high usage when little is open points to a background program working hard.
Step 3: Switch off unnecessary startup apps
Open Startup apps and check the startup impact column. Select anything you don't need the moment you sign in and choose Disable. Chat apps, game launchers and updaters are usually safe to disable, and they still open normally when you start them yourself. Leave security software and hardware utilities enabled.
Step 4: End a misbehaving program
If a program has frozen or is using far more resources than it should, select it on the Processes page and choose End task. Save your work in that program first if you can, because unsaved changes will be lost. Don't end processes you don't recognize, especially Windows processes, since some are needed to keep your PC running.
Step 5: Use Efficiency mode for heavy background apps
Windows 11 includes Efficiency mode, which lowers a process's priority so it uses fewer resources. On the Processes page, right-click an app you want to keep running in the background and choose Efficiency mode. Some Windows processes can't be changed.
What if Task Manager won't open?
If the shortcut doesn't respond, try Ctrl + Alt + Delete and select Task Manager from that screen. If your PC is completely frozen, restart it. If Task Manager is repeatedly blocked or closes immediately, run a full scan from Windows Security > Virus & threat protection > Scan options, because some malware tries to stop you from seeing what's running.
Go beyond Task Manager with System Mechanic
Task Manager shows you what's slowing your PC right now, but you have to check it yourself and fix each problem by hand. System Mechanic® from iolo automates that work:
- Process Scanner finds memory-intensive background tasks.
- Startup Optimizer speeds up Windows startup by managing the programs that launch at boot.
- Memory Mechanic frees up memory for better performance, and AppPrioritizer prioritizes speed for the apps you use most.
- LiveBoost automatically increases the speed and availability of CPU, RAM and drive resources.
- Smart ActiveCare® uses AI to detect and repair more than 30,000 different issues while your PC is idle, so slowdowns don't build back up.
System Mechanic runs on Windows 11, 10 and 8. One subscription covers up to 10 devices, meaning the personal computers in your home, and every paid edition comes with a 30-day money-back guarantee.
Frequently asked questions
What is the shortcut to open Task Manager?
Press Ctrl + Shift + Esc. It opens Task Manager directly in Windows 11 and Windows 10.
How do I open Task Manager when my PC is frozen?
Press Ctrl + Alt + Delete and select Task Manager. If nothing responds, restart the PC.
How do I see which programs are slowing down my PC?
Open Task Manager, go to the Processes page, and sort by CPU, Memory and Disk. The programs at the top with high usage are the ones using the most resources.
Is it safe to end tasks in Task Manager?
It's safe to end apps you recognize, such as a frozen browser, though you'll lose unsaved work in that app. Avoid ending processes you don't recognize, especially Windows processes.
How do I stop programs from opening at startup?
Open Task Manager and go to Startup apps, or go to Settings > Apps > Startup, and disable the programs you don't need at sign-in.
What is Efficiency mode in Task Manager?
Efficiency mode, in Windows 11, lowers a process's priority so it uses fewer resources. Right-click an app on the Processes page and choose Efficiency mode.
