Restart the computer
Close unused programs
Disable startup apps
Uninstall unnecessary software
Clear temporary files
Empty the recycle bin
Update the operating system
Update device drivers
Run a malware scan
Check available disk space
Defragment a hard drive if used
Optimize SSD settings if used
Increase RAM
Replace an old hard drive with an SSD
Check for overheating
Clean dust from vents and fans
Reduce browser tabs and extensions
Reset or reinstall the operating system if needed