1. Uninstall unwanted programs.
2. Disable startup items and services.
3. Check for malware.
4. Clear out your temporary files.
5. Perform a disk clean-up.
6. Run a disk defragmenter.
7. Update your drivers.
8. Install an anti-virus/anti-malware program.
9. Install a PC optimization software.
10. Help ensure proper ventilation of the computer.