How to Fix a Slow Computer

How to Fix a Slow Computer

If you are wondering how to fix a slow computer, start with the simple causes before assuming the computer is broken. A slow computer can be caused by too many open apps, outdated software, low storage, a faulty external drive, malware, internet problems, or aging hardware.

The good news is that some slow computer problems can be fixed at home. The bad news is that some issues are signs your computer may be nearing the end of its useful life.

Here are the steps TekStop recommends before you decide whether your computer needs a tune-up, repair, or replacement.

Step 1: Restart Your Computer

Before anything else, restart the computer.

This sounds too simple, but it works more often than people expect. Restarting clears temporary memory, closes stuck background processes, and gives the system a clean start. TekStop’s older slow computer article also recommends restarting as a basic first step.  

Do not just close the laptop lid. Do not only put it to sleep. Use the restart option from the menu.

After it restarts, give it a few minutes to fully load before testing performance.

Step 2: Close Applications You Are Not Using

Too many open applications can slow down your computer, especially if it does not have much memory.

Look at what is currently running. You may have browsers, email, photo apps, cloud storage, video call apps, games, printer software, and other programs all open at once.

Close anything you are not actively using.

Pay special attention to web browsers. Having 30 browser tabs open can use a surprising amount of memory, especially if those tabs include videos, ads, maps, email, or social media.

If the computer speeds up after closing apps, the issue may simply be that the computer is overloaded.

Step 3: Uninstall Programs You No Longer Need

Closing unused apps helps today. Uninstalling unused apps helps long term.

Old programs can take up storage, run background services, add startup items, or create update errors. If you never use them, remove them.

Look for:

• Old games
• Trial software
• Duplicate antivirus programs
• Toolbars
• Printer software for printers you no longer own
• Old photo tools
• Apps you installed once and forgot about
• “Cleanup” apps that promise unrealistic results

Be careful with anything you do not recognize. Some programs are needed by Windows, macOS, your printer, your security software, or your hardware. If you are unsure, ask for help before removing it.

Step 4: Perform System Updates and App Updates

Outdated software can cause performance problems.

Your operating system, browser, security tools, printer software, and everyday apps all need updates. Updates can fix bugs, improve stability, patch security issues, and help your computer work better with newer websites and devices.

Check for:

• Windows updates or macOS updates
• Browser updates
• Microsoft Office or productivity app updates
• Antivirus or antimalware updates
• Printer software updates
• Cloud storage app updates

After updates finish, restart the computer again.

If updates repeatedly fail, that may be a sign of deeper system issues, low storage, corrupted files, or an aging computer.

Step 5: Unplug Flash Drives and External Hard Drives

A faulty flash drive or external hard drive can slow down your computer.

Many people overlook this. If an external drive is failing, the computer may keep trying to read it, index it, scan it, or repair it in the background. That can make the entire system feel slow.

Unplug:

• Flash drives
• External hard drives
• Memory card readers
• Old backup drives
• USB hubs
• External devices you are not actively using

Then restart the computer and test performance.

If the computer runs better after unplugging a device, that device may be part of the problem.

Do not ignore failing drives. If important files are stored on an external drive that seems unreliable, get help before the data becomes harder to recover.

Step 6: Check Your Internet Speed

Sometimes the computer is not the problem. The internet is.

If websites load slowly, videos buffer, email takes forever, or cloud files will not sync, your internet connection may be the culprit.

Run a speed test and compare the results to the internet plan you pay for. Also test more than one device if possible. If your phone, tablet, and computer are all slow on the same WiFi network, the issue may be the internet service, modem, router, or WiFi signal.

TekStop has a related article on how to tell if your internet connection is working, including checking whether Sparklight is down in your area.  

A slow internet connection can feel exactly like a slow computer, so it is worth checking before replacing hardware.

Step 7: Perform a Virus Scan

Malware can make a computer slow, unstable, and unsafe.

Run a full scan using your antimalware or antivirus app. Make sure the security software is updated first, then scan the full system.

Watch for signs like:

• Pop-ups
• Strange browser behavior
• Unknown programs
• New toolbars
• Security warnings
• Slow internet
• Poor system performance
• Files acting strangely

TekStop’s virus removal service page notes that unusually slow internet or poor system performance can be symptoms of infection.  

If your scan finds malicious files, follow the cleanup steps. If problems continue, get professional help. Malware can hide, return, or cause damage that a basic scan may not fully fix.

Step 8: Check Available Storage

Low storage can slow down a computer.

Your computer needs free space to operate properly. If your drive is almost full, updates may fail, apps may run poorly, and basic tasks may feel sluggish.

Check your available storage. If it is nearly full, remove files you no longer need or move large files to a safe backup location.

Common storage hogs include:

• Photos
• Videos
• Downloads
• Old backups
• Duplicate files
• Large email attachments
• Old software installers
• Desktop clutter

Be careful when deleting files. If you are not sure what something is, do not delete it blindly.

Step 9: Avoid “Computer Cleanup” Gimmicks

Be careful with software that promises to magically speed up your computer.

Many cleanup tools overpromise, create scary warnings, or charge for fixes that do not solve the real issue. Some may even make things worse.

If your computer is slow, the better approach is to identify the actual cause. It could be software, storage, malware, internet, hardware, or age. Guessing can waste time and money.

Step 10: Consider Whether It Is Time to Replace Your Computer

If you have tried the steps above and your computer is still slow, it may be time to ask a bigger question: is this computer worth saving?

A slow computer may need replacement if:

• It is around 5 years old or older
• It cannot run updates
• It has failing hardware
• It is constantly out of storage
• It struggles with basic tasks
• Repairs are becoming expensive
• It has already been tuned up and still runs poorly

TekStop generally recommends replacing your computer every 5 years as a proactive measure. If your computer has failing hardware after 3 years, replacement may be better than repair depending on the issue and cost.

A professional inspection can help you decide.

When to Call TekStop

Call TekStop if:

• Your computer is still slow after restarting
• You are unsure what to uninstall
• Updates keep failing
• You suspect a virus
• You need help checking your internet or network
• Your external drive may be failing
• You are not sure whether to repair or replace the computer

TekStop can inspect your system, identify what is causing the slowdown, and recommend the most practical next step for your specific situation. 

The Bottom Line

Learning how to fix a slow computer starts with the basics: restart it, close unused apps, uninstall what you do not need, run updates, unplug external drives, test your internet, scan for malware, and check your storage.

If those steps do not solve the issue, the computer may need professional service or replacement. TekStop can help you figure out whether your slow computer is fixable or whether it is time for a newer, more reliable machine.

Is your computer still running slow? Contact TekStop today and we will help you find the real cause.