I knew something was not right with my PC. No, it wasn’t unstable. It didn’t even crash randomly. However, everything felt delayed. My apps would take longer to open, my browser stuttered at times, and even simple tasks like typing lagged behind my thoughts. When this started happening frequently, I blamed my hardware. I thought maybe it was actually time to upgrade RAM, or even my entire machine. In reality, it turned out that hardware wasn’t the problem. There was one app silently draining performance in the background. And I had no idea until I decided to open a simple Windows tool on my PC.
Slow PCs are easy to misdiagnose
You can make wrong assumptions
When I was stuck with a slow Windows machine, I did what most folks do. I started guessing. I thought about the usual aspects and jumped to the wrong conclusions. At one point, I assumed that more RAM could fix my sluggish system. Then, I thought that my Windows PC was bloated. I even blamed Windows updates for slowing down my system (I know we all do that at some point). I was even convinced that the CPU was just outdated to support my workflow.
Modern systems rarely fail in obvious ways, and this makes them tricky. In my case, things got worse slowly. I couldn’t spot one clear problem. There were background processes, hidden startup programs, and some poorly optimized apps eating up my resources. Sometimes, a process would start using way more processing power than it should, and I couldn’t understand why. In some cases, I felt it was an important system process, and other times, I was worried about whether my PC was infected with malware. If you don’t have a clear understanding of what’s happening behind the scenes, it’s easier to misdiagnose the issue. And that’s how you end up wasting your precious time and money chasing expensive upgrades you never needed.
Task Manager
My PC was noticeably slow most of the time. I wasn’t running any heavy apps or software. No gaming, no editing, and no creative tools. I was just using a web browser with some tabs and opened some of my everyday apps, like Slack and WhatsApp. Still, my system felt as if it were under constant stress. Out of growing frustration and mild curiosity, I opened Task Manager on my PC. I wasn’t expecting much, but something stood out instantly.
I was checking out different tabs in Task Manager. When I switched to the Processes tab, my CPU usage was somewhere around 80%, even though the system was under a very light load. Besides my browser, one app was glued to the top of the list, and my fans were working harder than they should. What was more surprising was the fact that it wasn’t even active. It wasn’t doing anything visible. No pop-ups, no active windows, and no indication of being active. It was just sitting in the background and consuming my precious system resources.
That’s when I realized my PC wasn’t slow. It was just overloaded by an unwanted app.
How I confirmed the culprit app and fixed the problem
Track everything down
In my Task Manager, I noticed Google Chrome and the Trellix Scanner service (it’s a core component of Trellix Endpoint security in Windows 11) were using the most CPU. Also, the CPU usage of WhatsApp was constantly fluctuating. I was using Google Chrome, but not WhatsApp. It launched right at the startup and stayed in the background. After I spotted them, I wanted to verify if they were actually responsible for the slowdown. So, I decided to perform a quick check with Task Manager. I left it open in the background and started using my PC normally. I was switching tabs and opening apps. I was sure that my machine wasn’t under intense load. Every time my machine lagged, I noticed that the CPU usage of WhatsApp spiked. The pattern was consistent. Then, I decided to right-click WhatsApp and hit End Task. I also reduced the number of tabs in Chrome. The Trellix Scanner service is a core process that provides real-time protection, so I didn’t want to touch it.
Once I ended those tasks, the difference was immediate. My CPU usage dropped, the fans became quieter, and my PC felt smoother, like the load had been released. I wanted to make sure that the app never runs without my knowledge. I visited the Startup apps tab in the Task Manager and disabled that app. I also disabled several other unnecessary apps that I don’t need right away on launch. That’s all it took. No major system tweaks or expensive hardware upgrades. Just removing one app made my Windows PC a lot faster.
Well, that was my case. If you find an app is consuming too many resources on your system, you should not end it right away. I’m saying this because not all apps and processes can be deleted safely. A process might appear unfamiliar to you, but it could be an important system process that Windows requires to run properly. If you interrupt these vital processes, it might do more harm to your PC. For instance, it could corrupt a backup or cause stability issues on your machine. We obviously won’t want that to happen. So, it’s extremely important to understand the process before quitting. If you’re unsure, you can right-click a process and learn more about it online. I always do this when I spot some weird or strange names on my list.
The biggest performance killers you need to check
Usual suspects behind a sluggish PC
After fixing the issue, I started paying closer attention to what’s happening behind the scenes on my PC. I usually check these things in Task Manager.
- Startup bloat: This is really a big one. Many apps quietly add themselves to the startup apps list without even asking. You must have noticed some apps, like antivirus software or cloud storage, launching immediately as soon as you turn on your computer. It’s fine to have some essential ones running during the launch. However, when there are too many startup apps, your PC boots into a crowded environment before you’ve opened an app you actually need.
- Idle apps: Some apps are never fully closed. You may not be using them actively, but they keep running quietly in the background. The most common ones are chat apps, game launchers, and cloud sync tools. They can quickly add up and affect the performance of your PC.
- Poorly optimized apps: Some apps might not be designed properly. They might refresh unnecessarily, constantly ping the network, or drain the battery. They won’t crash your system, but degrade the performance slowly.
- Overloaded browsers: Most of us may feel that browsers don’t consume many resources, but that’s not always the case. If you have too many open tabs, extensions, and background processes, your browser could be the heaviest thing that you run. This happens to me a lot. They can quietly consume huge amounts of memory and CPU. You can expand your browser in the Task Manager to see the details. Major browsers like Edge, Firefox, and Chrome even have their own Task Manager.
If you feel something isn’t right with your PC, you must check out these things first.
I finally disabled these Windows services and my PC is happier for it
Your PC might be secretly working harder than you are, and not always in ways that benefit you.
Task Manager is way more useful than people think
Most folks only open Task Manager to force-quit unresponsive apps on their machines. Frankly, I had also been doing the same for a very long time. But that’s not only what your Task Manager is made for. It can actually help you diagnose performance issues without installing any third-party app. In a few seconds, you can spot abnormal resource usage, see which programs impact startup, and identify problematic apps. No guesswork or random fixes.
What really surprised me was how wrong I had been. I was already convinced that I had to go for an upgrade because my PC wasn’t performing the way I expected. But in reality, it was slowed down by a nifty app that I barely use. Now that I know how to utilize Task Manager properly, I’m using it more often, and it saves me from a lot of unnecessary frustration. If you’re also planning to upgrade your slow PC, pause for a moment and open Task Manager. You might discover a fix that isn’t complicated or expensive.
