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

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.

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• Your version of Windows or other software is out of date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."

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".

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.

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, Qiling CleanGenius is recommended. Use it to clean up all the junk files at once for more free space.

1 - Clean up junk files

• Free Download
• Windows 11/10/8/7, 100% Secure

Step 1. Download and install Qiling Partition Master Suite on your PC. Click to download PC Cleaner on panel.

Step 2. Install Qiling CleanGenius on your PC. To begin with, navigate to "Cleanup" and click "Scan."

Step 3. Qiling CleanGenius will start immediately to scan all the useless files, select system junk files and invalid entries, and click "Clean" over all your PC.

Step 4. Once completed, you can see clearly how many MBs or GBs of data are cleaned. Click "Done" to finish the process.

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 Qiling Partition Master. Do it with the following steps.

• Free Download
• Windows 11/10/8/7, 100% Secure

Step 1. Select C drive and click "Resize/Move" to extend C drive.

When your C drive is out of space, you will see the Low Disk Space alert on Qiling Partition Master. Click the "Resize/Move" button to extend it.

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

Drag the C partition end into the unallocated space so to extend it. And click "Proceed" to your C drive to solve the low space issue.

• Free Download
• Windows 11/10/8/7, 100% Secure

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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