How to clear the cache to make a computer faster?

Clear Cache: Boost Computer Speed

Temporary files accumulate over time and may consume valuable system resources. Clearing the cache to make a computer faster is a straightforward process that can restore responsiveness and free up disk space. Understanding the correct steps ensures you benefit without affecting essential data.

Understanding Cache and Why It Slows You Down

Clearing the cache involves deleting temporary data stored by your operating system and apps to free up storage and reset processes that might be lagging. While cache usually helps speed things up by pre-loading data, it can become a bottleneck when it gets too large or corrupted. To clear it effectively, you should focus on system temporary files, browser data, and DNS records using built-in tools like Disk Cleanup and Storage Sense.

Ill be honest, the first time I tried to clean my computer, I was terrified I would accidentally delete my family photos or important work documents. I spent hours hovering over the Delete button. But here is the reality: cache is essentially just scratch paper for your PC. It is designed to be temporary. If you delete it, your computer simply starts fresh.

System junk and temporary files can easily occupy 15-20 gigabytes of storage over six months of regular use, which is enough to significantly impact performance on smaller drives. But there is one specific cache most people ignore that can cause phantom website errors - Ill show you how to zap it in the DNS section later.

How to Clear System Cache on Windows

Windows stores a massive amount of system-level cache that the average user never sees. Over time, these files accumulate in the background, consuming valuable space on your Solid State Drive (SSD). When an SSD reaches 80-90% of its total capacity, write speeds can drop significantly due to the way flash memory handles data blocks. This is why a full drive feels so much slower than a fresh one. ^[2]

Using Disk Cleanup for a Deep Clean

Disk Cleanup is the old reliable tool for this job. To use it, press the Windows key and type Disk Cleanup. Select your main drive (usually C:) and click OK. Once the window opens, click Clean up system files to reveal even more hidden data like old Windows Update files. Check the boxes for Temporary files, System error memory dump files, and DirectX Shader Cache. Click OK and let it run. It might take a few minutes if you have never done this before. Be patient.

Emptying the %temp% Folder Manually

Sometimes Disk Cleanup misses specific application leftovers. To find these, press Windows Key + R, type %temp% and hit Enter. This opens a folder filled with digital leftovers from apps you have used throughout the day. Typical temp folders contain 2,000 to 5,000 files for an average user after a month of work. Select everything (Ctrl + A) and hit Delete. If a window pops up saying a file is in use, just click Skip. It means that app is currently open and needs that file. No big deal.

Clearing Browser Cache for Faster Surfing

Your web browser is likely the biggest cache hoarder on your machine. Every image, script, and icon from every website you visit gets stored locally so the site loads faster next time. However, browser caches often grow to exceed 1 gigabyte in size within just 30 days of active web browsing. When this database gets too bulky, the browser spends more time searching the cache than it would have spent just downloading the file fresh.

In most modern browsers like Chrome, Edge, or Firefox, you can use the universal shortcut: Ctrl + Shift + Delete. This brings up the Clear browsing data menu instantly. I recommend selecting the All time range and checking Cached images and files. You do not necessarily need to clear cookies unless you want to log out of every site you use. Clearing the cache can improve initial page load times for new sites by freeing up the browsers internal processing resources. It feels like giving your browser a fresh start. ^[5]

The Hidden Fix: Flushing the DNS Cache

Remember that phantom error I mentioned earlier? This is the resolution. Sometimes your computer remembers the wrong IP address for a website - perhaps because the site moved or changed its security settings. This results in the dreaded Site cant be reached error even when your internet is fine. Flushing the DNS cache can help resolve connection issues for many users experiencing these specific loading errors. ^[6]

To fix this, right-click the Start button and select Terminal (Admin) or Command Prompt (Admin). Type the following command exactly: ipconfig /flushdns and hit Enter. You should see a message saying the DNS Resolver Cache was successfully flushed. It takes less than 5 seconds. I once spent three hours troubleshooting a broken website only to realize the DNS cache was just holding onto an old, invalid link. One command fixed it instantly. Lesson learned: always flush DNS first when the internet acts weird.

Built-in Windows Cleanup vs. Manual Folder Deletion

Storage Sense (Automated)

• Highest safety; only deletes files that Windows knows for certain are no longer needed

• Moderate; focuses on general junk rather than deep application-specific cache folders

• Completely automatic; once enabled in Settings, it works in the background without user input

Disk Cleanup (Standard)

• High; users choose which categories to delete with clear descriptions provided

• Good; can remove system-level files like previous Windows installations that take up massive space

• Simple interface but requires manual triggers to start the cleaning process

Manual %temp% Cleaning

• Moderate; requires user to skip 'in-use' files manually to avoid app crashes

• Maximum; allows for specific deletion of files that automated tools might ignore

• Moderate; requires knowing keyboard shortcuts and navigating file directories

The Frustrated Freelancer: Mark's Drive Rescue

Mark, a graphic designer in Seattle, noticed his high-end laptop taking nearly 30 seconds to open a simple Chrome window. He was constantly getting 'Low Disk Space' warnings despite having deleted all his old large video projects. He felt defeated, thinking he needed a new $2,000 laptop.

He first tried deleting more personal files - photos from 2020 and old documents. But the 'red bar' on his C: drive barely moved. He grew frustrated when the system lagged during a live client presentation, causing the screen to freeze for a full 10 seconds while the cache struggled to find space.

The breakthrough came when he learned about the hidden System Cache. Instead of just deleting files he recognized, he used the 'Clean up system files' option in Disk Cleanup. He realized he had over 45 gigabytes of 'Windows Update Cleanup' data left over from a version jump 6 months ago.

After the cleanup and a quick restart, Mark reclaimed 52 gigabytes of space. His boot time dropped from 45 seconds to just 12 seconds, and the 'Low Disk Space' errors vanished. He saved his money and learned that the biggest space-hogs are often invisible to the naked eye.