Restart the computer regularly
Close unused programs and browser tabs
Uninstall unnecessary software
Disable startup programs
Update the operating system
Update device drivers
Run antivirus and malware scans
Delete temporary files and cache
Free up disk space
Defragment a hard drive if using HDD
Upgrade to an SSD
Add more RAM
Check for overheating and clean dust from vents
Use a lighter browser or fewer extensions
Reduce visual effects and animations
Keep software up to date
Scan for background processes using too many resources
Reinstall the operating system if needed