Restart the computer
Close unused apps and browser tabs
Disable startup programs
Uninstall unused software
Free up disk space
Empty the recycle bin
Run a malware scan
Update the operating system
Update device drivers
Check for background processes using high CPU or memory
Defragment a hard drive if not using an SSD
Optimize or trim an SSD if supported
Increase RAM
Replace an old hard drive with an SSD
Clean dust from vents and fans
Improve airflow and cooling
Reduce visual effects and animations
Use a lightweight browser
Clear browser cache
Reset or reinstall the operating system if needed