Computer system optimization is a key part of ensuring the efficient operation of computers. As the computer grows in use, the system becomes slow and unstable, and this is where system optimization is required. This article will introduce the methods of computer system optimization, including disk cleanup, system upgrade, virus scanning, and startup item management. 1. Disk CleanupWith the growth of computer usage time, the disk space will gradually decrease, resulting in slow system operation. Therefore, it is very necessary to do disk cleanup regularly. First of all, you can use the disk cleanup tool that comes with the system to clean up and delete files and programs that you no longer need. Secondly, you can use third-party software such as CCleaner to do a deep cleaning of the system to get rid of junk files and invalid registry entries. 
2. System UpgradeTimely upgrade of the system can ensure the security and stability of the computer. Microsoft regularly releases security patches and updates to fix system vulnerabilities and improve performance. Therefore, it is advisable to check and install system updates regularly. At the same time, you can also use third-party software such as Windows Update and other tools for automatic upgrades. 3. Virus Detection and Killing Computer Viruses are one of the important causes of system crash and data loss. Therefore, it is necessary to check and kill viruses regularly. It is recommended to use reliable antivirus software such as Kaspersky, 360 Security Guard, etc., and to update the virus database regularly to maintain its effectiveness. At the same time, you should also pay attention to the software and files from regular channels to avoid files with viruses. 4. Startup Item ManagementToo many startup items will cause the system to boot up slowly. Therefore, you need to manage your startup items well. First, you can use the system's built-in Task Manager to view and manage your startup items. Secondly, you can use third-party software such as ccleaner to manage startup items, disable unnecessary startup items to improve startup speed. 5. Turn off unnecessary servicesSome services run automatically when the system starts, but these services may not need to run all the time. As a result, some unnecessary services can be shut down to save resources and improve system performance. In Windows, you can use the Service Manager to view and manage services. 6. Optimize Power OptionsPower options are important settings to control the operation of computer hardware. By optimizing power options, you can reduce the power consumption of your hardware and improve its performance. On Windows, you can go to the power options settings and select "High Performance" mode for better performance. 7. Turn off the screen saver: The screen saver will automatically run to protect the screen when the computer is not in use for a long time. However, when you need to use your computer, a screen saver can slow down your system's performance. Therefore, it is recommended to turn off the screen saver when you need to use your computer. 8. Clean browser cache and cookiesBrowser cache and cookies are one of the important reasons for the slow loading speed of web pages. Therefore, regularly cleaning your browser cache and cookies can improve web page loading speed and system performance. In Windows, it can be cleaned up using the settings or extensions of browsers such as Internet Explorer or Google Chrome. 
9. Disabling Unnecessary Plug-ins and ExtensionsBrowser plug-ins and extensions can enhance the functionality and user experience of the browser. However, some plugins and extensions may affect the performance and stability of your browser. Therefore, it is advisable to disable unnecessary plugins and extensions to improve the performance and stability of your browser. 10. Regular data backupWhen system optimization is carried out, data backup is very important. If you accidentally delete important files or configuration information while doing optimization, it can lead to data loss or system crash. Therefore, it is advisable to back up your data regularly to avoid unexpected situations. 