Restart the PC regularly
Close unused programs and browser tabs
Disable unnecessary startup apps
Uninstall unused software
Update Windows or your operating system
Update device drivers
Run a malware scan
Free up disk space
Delete temporary files
Defragment a hard drive if using HDD
Use an SSD instead of an HDD
Add more RAM
Lower visual effects and animations
Set power mode to High performance
Keep the PC cool and dust-free
Check for background processes using too much CPU or memory
Update the BIOS or firmware if needed
Reinstall the operating system if performance is still poor