As a long-time Windows user, I know as well as anyone what it's like to chase better performance. I always worry about my PCs getting bloated and too slow, and as you might imagine, this has led me to try many different ways to improve PC performance over the years.

But while there are things you can certainly do to help clean up your Windows 11 PC or improve its performance, it's important to know that some of the "optimizations" you'll see recommended can do more harm than good. It's important to know when it's a good time to take certain steps, because they're not always beneficial.

Your RAM doesn't need help

Windows knows what it's doing

Something I used to see a lot of people searching for was ways to free up RAM or increase the available RAM on Windows. I'm sure you're familiar with the "just download more RAM" jokes, but that's a thing people always sort of wanted. And while there are more serious options like creating a larger page file or using Windows ReadyBoost (which is particularly useful for machines with HDDs), one option that's not really recommended is using programs that "clean" your computer's RAM.

The RAM on a computer is used as a way to store data that needs to be accessed quickly and frequently. It's much faster than using an SSD, and because of that, data that requires especially fast read times is usually stored here. RAM typically stores information about the state of open apps, so you can more easily multitask and switch between apps without feeling any slowdowns. Windows can manage RAM intelligently, so when data stored on it is no longer a priority and there's no more space, your computer will prioritize using RAM for the information that's more immediately necessary, ensuring your computer runs as smoothly as possible.

Based on that, you can probably already tell what the problem with RAM cleaners is. What you're doing by cleaning the RAM is making that important data no longer available, which can actually slow down tasks on your PC. If information can no longer be loaded from RAM, it either needs to be loaded from the disk or some information may need to be refreshed (in the case of something like a web browser, for example), which takes noticeably longer. Windows won't keep hogging your memory if it's needed for something else, so you don't need to try and interfere with it. Let Windows manage it, and you'll likely be better off.

Caching happens for a reason

Are you that desperate for space?

While we just talked about RAM, something very similar can be said of your disk itself and what happens with caching. When you use your computer, whether it's local files or a web browser, certain files like thumbnails, icons, and images are saved in cache. What this does is allow for webpages and UI elements to load more quickly by simply pulling information already on the disk, rather than using additional CPU resources to render those files again, or using extra data to download them from the internet.

Once again, this is a feature that enhances performance. By avoiding extra CPU work or downloads, all of these files can load faster and things generally feel snappier. Which is why running tools like Disk Cleanup or third-party alternatives such as CCleaner is actually counter-intuitive, especially when you do it too frequently. Constantly deleting cached files isn't going to improve your PC's performance, and in fact, it will likely make it worse for a bit.

You should only run these space-saving utilities when you're truly low on storage to the point where it affects performance, or you simply can't save more files. In fact, by default, Windows does exactly that, running Storage Sense only when you're low on disk space. That's the best approach. At most, you can maybe run these every few months, as there may be some cached files you no longer need, but you will notice things are a bit slower for a while after you do this. That's the entire point of cache.

Registry keys should also be left alone

There's no benefit

Finally, it's also worth noting that some programs out there claim to "clean" your registry, and you should steer clear of those, too. While deleting unnecessary registry keys won't hurt your performance, it also won't improve it, or even save any significant amount of space. Registry keys are absolutely tiny pieces of data that, if unused, make no difference to your system.

You shouldn't notice worse performance from cleaning your registry, but in the worst-case scenario, a registry cleaning program could delete keys that are actually still in use by a program and potentially cause that program to stop working as intended. It's just another thing that's better left alone.

Your computer manages itself better than you think

There are certain things you can do to help improve your PC's performance, and cleaning up unnecessary files can help. But that shouldn't come from clearing the cache on your PC, it should come from more active file and program management to ensure you don't have anything you don't need. And other things, like disabling startup tasks, can also greatly impact performance and startup times.

Simply clearing the cache or clearing your RAM isn't going to make your computer faster. If you truly need more RAM, unfortunately, your best option may be spending some money to buy an upgrade, whether it's a new PC or a RAM stick.