1. Uninstall unwanted programs.
2. Clean up junk files and temporary files.
3. Disable startup apps and services.
4. Stop animations and visual effects.
5. Update drivers and operating system.
6. Use a lightweight antivirus program.
7. Check for malware and remove it.
8. Use an SSD instead of HDD.
9. Increase RAM if possible.
10. Use ReadyBoost.