Other ways to speed up your computer include:
1) Defragmenting (make sure you aren't defragging an SSD though).
2) If you have under ~20% of disk space, uninstall unneeded programs, delete unnecessary files, and empty the recycling bin. A hard drive near capacity takes longer for it to search through data.
3) Update outdated drivers. Newer drivers will likely be better performing (though often may be miniscule at most, or may cause its own problems).
4) For malware scanning, I'd recommend to download and install Malwarebytes Anti-Malware. For general cleaning, CCleaner (proceed with caution and if you modify the registry, make sure to back it up).