My old ThinkPad X230 boots Windows 11 in about 40 seconds. It has a spinning disk-era processor and 8GB of RAM. A friend’s brand-new laptop with double the specs was taking over two minutes to reach a usable desktop. Same OS. The difference was almost entirely software cruft, not hardware.
That is the good news. You do not need to buy anything to fix most slow PCs. Microsoft‘s own troubleshooting guidance for slow performance is essentially a checklist of free fixes, and after working through them on a handful of machines, I can confirm the order matters. Here is how to actually do it, based on how Windows behaves in practice.
Start with a real diagnosis, not a guess
Before you disable anything, find out what is actually eating your resources. There is no point stripping visual effects if the real problem is a background app chewing through disk.
Press Ctrl + Shift + Esc to open Task Manager. Look at the Processes tab and sort by CPU, then Memory, then Disk. Microsoft’s guidance recommends exactly this: monitor CPU, memory, and disk usage to identify the processes slowing you down, then check the Performance and Startup apps tabs to see which components are using high resources.
Two things to watch for. First, if Disk sits at 100 percent for minutes after boot, that is usually startup apps and indexing fighting for the same drive, and it is fixable without new hardware. Second, check the Startup impact column. Anything marked “High” is fair game for disabling.
Cut the startup list
This is the single biggest free win on most machines, and it is the fix people skip because it feels risky.
In Task Manager, click Startup apps in the left-hand menu. Right-click anything you do not need at login and select Disable. Microsoft’s own instructions describe this as reducing background activity, because startup apps slow boot time and keep consuming resources after you are logged in.
What can go? Game launchers, chat clients, cloud-sync clients you only use occasionally, updater helpers, printer utilities. What should stay? Your antivirus, your audio driver utility, and anything you genuinely want running all day. Disabling a startup entry does not uninstall the app. You just open it manually when you need it. Nothing here is permanent.
Then kill background permissions
There is a second layer most people miss. Some apps keep running even when you have closed the window.
Go to Settings > Apps > Installed apps, find the offender, click the three dots, then Advanced options. Under “Let this app run in the background,” set it to Never. Microsoft documents this as a direct performance fix, since background processes consume resources even when the app is not in use.
Free up storage the lazy way
Low free space genuinely slows Windows down, and Microsoft lists limited storage as one of the primary causes of poor performance.
You do not have to hunt through folders by hand. Windows 11 ships with Storage Sense, which automatically deletes temporary files and Recycle Bin items for you. Turn it on at Settings > System > Storage. Set it to run when space gets low, or on a schedule if you prefer.
For a manual sweep, uninstall apps you no longer use. Settings > Apps > Installed apps, find the junk, uninstall it. That frees storage and reduces background activity at the same time. I usually find two or three apps on any given machine that the owner forgot existed.
Visual effects, power mode, and the trade-offs
Both of these work. Neither is free. I want to be honest about that.
To trim animations, search the Start menu for “Adjust the appearance and performance of Windows,” open it, go to the Visual Effects tab, and select “Adjust for best performance.” Windows stops animating menus and shadows, and the interface feels snappier on older hardware. On a modern machine you will barely notice the difference in speed, so only bother if you are on something older.
Power mode is the bigger lever. Go to Settings > System > Power & battery and set the Power mode dropdown to Best performance. Microsoft notes this lets the CPU run at higher performance when needed. The catch, spelled out in the same support article: it increases power consumption, drains laptop batteries faster, and can make the device run warmer. On a desktop, set it and forget it. On a laptop, use it when you are plugged in.
Update, then scan
I know, updates are the boring answer. But Windows Update often includes fixes and performance improvements, and sometimes a non-critical driver arrives through the optional updates channel that helps a specific component behave.
Go to Settings > Windows Update > Check for updates. If it says you are up to date, click Advanced options > Optional updates and see what is sitting there. Install anything relevant. The machine may restart, which is fine.
Next, run a malware scan. Malware consumes CPU and disk, and both directly reduce system performance. If you already run a decent antivirus, use its full scan. It is a slow scan, so kick it off and go do something else.
Small stuff that adds up
A few minutes of housekeeping covers the rest:
- Notifications: Settings > System > Notifications. Turn off alerts from apps you do not care about. Microsoft lists this as a small performance improvement, and honestly the bigger benefit is fewer interruptions.
- Optimize your drive: Search for “Defragment and Optimize Drives,” pick the drive, and hit Optimize. On a hard drive this genuinely helps. On an SSD, Windows just sends a trim command, which is quick and harmless.
- Close what you are not using: Too many open apps and browser tabs slow performance. Close them. If things still feel sluggish, restart the PC, then open only what you need.
When none of this is enough
I will be straight with you. Microsoft’s own guidance includes a note that older PCs with outdated hardware may not see significant improvements from these steps, and in those cases upgrading the device is the best long-term fix.
That is not a sales pitch, it is a real ceiling. If your machine has a mechanical hard drive, that is your bottleneck, and no amount of tweaking fixes it. If you are already on an SSD with 8GB of RAM and the startup list is clean, the free wins are largely spent. Run through everything above first, though, because a surprising number of “slow” PCs are just carrying five years of accumulated startup entries and a full drive. Those you can fix today, for nothing.
One last thing worth saying plainly: skip the PC cleaner apps that show up in forum threads promising to do all of this automatically. Every fix in this article is a built-in Windows setting. You do not need to install anything, and the tools that claim to optimize your registry are usually the thing slowing it down.