EaseUS Partition Master

A simple partition tool to manage disk space in Windows 10

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Windows 11/10 Slow Suddenly: The Complete Guide to Speed Up Windows 11/10

Updated by Roxanne on Sep 24, 2021
Written by Brithny

Today I'm going to show you how to resolve Windows 10 slow from scratch. When your computer running slow all of a sudden, it is frustrating. It is hard for beginners to figure out why the computer is so slow all of a sudden.

Overview - Computer Running Slow Windows 11/10

"I've had this PC for about 1.5 years now, and it's always worked fine and fast. Then about a week ago, it started being very slow suddenly; whether it's opening an app or right-clicking, it's just very slow. Nothing was installed, and prior to then, everything I did was routine. It is very weird. Why is my Windows 10 running slow all of a Sudden? Please let me know if you have any ideas on what I can do next!"

In this guide, I'll show you exactly how to troubleshoot Windows 10 running slow on your computer.

Workable Solutions Step-by-step Troubleshooting
Why is Windows 10 so slow Your computer was running for a long time without a reboot, not enough free hard drive space...Full steps
Quick tips on Windows 10 slow Reboot your computer, scan for malware or viruses, close background programs, update Windows...Full steps
Advanced fixes to Windows 10 slow Delete temp files, free up Windows 10 disk space, erase computer and start over...Full steps
FAQs about Windows 10 slow How to speed up Windows 10? Why is Windows 10 so Slow? How to stop Windows 10 from lagging...Full steps

Why Is My Computer So Slow All of a Sudden

How often do you feel frustrated with your computer acting up, being slow, or freezing up? This list does not cover all the reasons, but when it comes to personal computers it should give you a head start on understanding what causes slow performance specifically for Windows-based machines. Here are some common reasons why Windows 10 running slow.

  • Your computer was running for a long time without a reboot
  • Not enough free hard drive space
  • Hard drive corrupted or fragmented
  • The computer is infected with a Virus or Malware
  • Too many background programs
  • Computer or processor is overheating
  • Your version of Windows or other software is out of date
  • Hardware failure...

Quick Fixes for Windows 11/10 Running Slow and Unresponsive Issue

Now that you have known the reason why your computer running slow Windows 10, you can follow the quick fixes to solve your problem and speed up your PC or laptop.

Method 1. Reboot your computer

If your computer has not been rebooted recently, make sure to reboot it before following any of the fixes below.

  • Click the "Start" icon.
  • Go to "Shut down or sign out > Restart."

reboot your pc to speed up windows 10

Method 2. Scan for malware or viruses

If your computer is infected with one or more viruses, this can cause your computer to run slow. Use your antivirus software to scan your computer. You can also try to remove the virus without using antivirus software 

  • Run the Windows Command Prompt with the Admin privilege.
  • Type the command: attrib g:*.* /d /s -h -r -s and hit Enter. (Replace the drive letter g with your own external hard drive's drive letter.)

Method 3. Close background programs

One of the most common reasons for a slow computer is programs running in the background. Remove or disable any TSRs and startup programs that automatically start each time the computer boots. To see what programs are running in the background and how much memory and CPU they are using:

  • Open "Task Manager".
  • Choose the one and close.

Method 4. Update Windows 

Make sure that you have the latest Windows updates installed on your PC. If you are on the Internet when your computer is slow, make sure all browser plugins are up-to-date.

  • Click the "Start" icon
  • Go to "Settings > Update & Security settings > Windows Update".

update Windows 10 to solve Windows 10 running slow

Advanced Solutions to Windows 11/10 Slow Suddenly

If the quick fixes fail to solve the computer or laptop running slow Windows 10, follow the advanced methods below to try out and speed up Windows 10.

Fix 1. Delete temp files

As a computer runs programs, temporary files are stored on the hard drive. Deleting these temp files can help improve computer performance. You can use Disk Cleanup to delete temp files, and you can also automatically delete temp files.

related articles

How to Automatically Delete Temp Files in Windows 10/8/7?

Follow this post to delete all the temporary files and folders you have selected without difficulty.

how to delete temp files automatically

Fix 2. Free up Windows 10 disk space and increase C drive space

For some serious hard drive issues that might cause a hard drive overloaded and sluggish, you need the advanced help of professional toolkits! Here, EaseUS CleanGenius is recommended. Use it to clean up all the junk files at once for more free space.

1 - Clean up junk files

Step 1. DOWNLOAD and install EaseUS CleanGenius on your PC. To begin with, navigate to "Cleanup" and click "Scan".

clean up system step 1

Step 2. EaseUS CleanGenius will start immediately to scan all the useless files, select system junk files and invalid entries and click "Clean" over all your PC.

clean up system step 2

Step 3. Once completes, you can see clearly how many MBs or GBs of data that are cleaned. Click "Done" to finish the process.

clean up system step 3

2 - Increase system C drive

If cleaning up junk files doesn't make too much free space for you, another effective solution to Windows 10 suddenly slow problem is to simply expand your C drive with EaseUS Partition Master. Do it with the following steps.

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Step 1. Click "Adjust with 1-Click" to extend C drive.

When your C drive is out of space, you will see the Low Disk Space alert on EaseUS Partition Master. Click the Adjust button to extend it.

How to Adjust Low C Drive Space Step 1

Step 2. Click "OK" to extend C drive automatically.

By clicking "OK", EaseUS Partition Master will automatically allocate space to your C drive to solve the low space issue.

How to Adjust Low C Drive Space Step 2

Extra Option: You can also click "Manual Adjustment" to extend the C drive manually.

When turning to Manual Adjustment, select the C drive, and drag dots rightward to add more space to C drive. Click "OK" to confirm.

Manually Adjust Low C Drive Space

Step 3. Confirm to resolve low disk space in C drive

Click the "Execute Operation" button at the top corner and start all pending operations by clicking "Apply".

How to Adjust Low C Drive Space Step 3
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Fix 3. Erase computer and start over 

If none of the above solutions resolves your issues, another option is to either reinstall Windows or erase everything and then start over.

Note: Do remember to back up data before you take action to erase data.

Erasing everything and starting over can increase performance by getting rid of old software or drivers that may be on the computer and causing the computer to be slow. Installing a fresh copy of Windows, software programs, and the latest drivers help verify there are no software related issues causing your computer to be slow.

Conclusion

Thanks to this guide, you don't need to spend hours searching for Windows 10 slow solutions. You have got everything you need to speed up your Windows 10/8/7 computers. As you can learn from this full guide, Windows slow issue is caused by many reasons and can be solved by many solutions. From all the solutions, I recommend Quick Fixes. These solutions are easy and effective. Most users can solve the computer running slow issue when they have restarted their computers.

Windows 11/10 Slow Related Questions

Let's take a look at the three hot questions that users are most concerned about Windows 10 slow problem.

Can I speed up my computer with Windows 10?

How to speed up Windows 10? Try effective solutions below.

  • Restart your PC
  • Install the latest Windows 10 update
  • Change the power plan
  • Disable startup programs
  • Defragment and optimize drives
  • Use ReadyBoost to speed up Windows 10...

How do I stop Windows 10 from lagging?

  • Go to "Settings". Click "Update and Security".
  • Go to Windows Update and click "Advanced options".
  • Click on "Delivery Optimization", then choose "Choose how updates are delivered".
  • Turn off "Updates from more than one place".

Why is my computer so slow all of a sudden?

A slow computer is often caused by too many programs running simultaneously, taking up processing power, and reducing the PC's performance.

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Updated by Roxanne

Roxanne is one of the main contributors to EaseUS and has created multiple posts on digital devices like PCs, Mobile phones, tablets, Mac, etc. She loves to share ideas with people of the same interest.

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Written by Brithny

Brithny is a technology enthusiast, aiming to make readers' tech life easy and enjoyable. She loves exploring new technologies and writing technical how-to tips. On her spare time, she loves sharing things about her favorite singer - Taylor Swift on her Facebook or Twitter.

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  • I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes. I also think the overall look and feel of EaseUS Partition Master Free makes whatever you're doing with your computer's partitions easy.

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  • Partition Master Free can Resize, Move, Merge, Migrate, and Copy disks or partitions; convert to local, change label, defragment, check and explore partition; and much more. A premium upgrade adds free tech support and the ability to resize dynamic volumes.

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  • It won't hot image your drives or align them, but since it's coupled with a partition manager, it allows you do perform many tasks at once, instead of just cloning drives. You can move partitions around, resize them, defragment, and more, along with the other tools you'd expect from a cloning tool.

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All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.

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