


Why is my PC so slow on Windows, and how can I improve performance?
Jul 12, 2025 am 01:17 AMCommon reasons for slowing PCs include high system resource usage, excessive startup items, and degraded hard disk performance. You can check the background program through the Task Manager to close the high resource occupancy process; open the Task Manager "Start" page to disable unnecessary boot programs; use the disk cleaning tool to free up space and defragment the HDD; regularly update the system and drivers to avoid compatibility issues; if the problem continues, consider upgrading the hardware such as adding memory or replacing the SSD.
There are many possible reasons for your PC to slow down, common ones include system resources occupied, too many startup items, and degraded hard disk performance. The key to improving the running speed of Windows computers is to identify bottlenecks and deal with them in a targeted manner.

Check background program and system resource usage
One of the most common reasons why Windows runs slower is that background programs take up too much CPU, memory, or disk resources. You can check which programs are currently "sneaking resources" through the task manager (Ctrl Shift Esc).
- Click the "Performance" tab to see if the CPU, memory, and disk usage is at a high level for a long time.
- If a process continues to occupy high resources, right-click to select "Search Online" to quickly understand what program it is
- Close unnecessary browser tags or multi-opening software, especially Chrome browsers, which often take up a lot of memory
It is recommended to clean the background programs regularly, especially those software that are not commonly used when powering on and booting.

Optimize startup items to reduce startup burden
Many software is set to power on by default, resulting in a long halt every time you boot. Startup items can be managed in the following ways:
- Open Task Manager → "Start" tab
- Disable the program that does not need to be turned on (right click → disable)
Common items that can be closed include:

- Chat tools (such as QQ, WeChat)
- Music player
- Additional functions of input method
- Third-party driver management software
Note: Some system key services should not be disabled at will, such as antivirus software or hardware driver related items.
Clean disk space and optimize hard disk performance
If your computer is still using a mechanical hard drive (HDD), fragmentation will affect the reading speed. Even solid-state drives (SSDs), full space will affect performance.
You can do this:
- Use the system's own "Disk Cleanup" tool to delete temporary files and caches
- Turn on "Storage Awareness" in "Settings → System → Storage" to automatically clean useless files
- Perform disk defragmentation on HDD (not required by SSD)
Also, make sure the system disk (usually a C disk) retains at least 10% of the free space, otherwise the system will run slowly.
Update the system and drivers to avoid compatibility issues
Sometimes too old system or driver version can lead to performance abnormalities. For example, old graphics card drivers may cause slow graphics rendering, and unpatched system may also affect stability.
suggestion:
- Check Windows updates regularly (Settings → Update & Security)
- Use the Device Manager to update the main hardware drivers, especially graphics cards, motherboards, and network cards
- If the system version has just been upgraded, it may be that the driver is incompatible, try rolling back or reinstalling
Basically these common methods. Start with the simplest troubleshooting, such as closing the startup items and cleaning the background program, which can significantly improve the speed in most cases. If the problem still exists, you may want to consider replacing the hard drive or installing a memory stick.
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