http://www.thewindowsclub.com/improve-gaming-performance-in-windows-with-a-click-with-gboost
Improve Gaming performance in Windows with a click with GBoost
GBoost is a free Windows game booster service that allows you to temporarily strip down your un-required services & processes, and closes running apps and open windows and puts your PC in a bare essentials state required for gaming. All in a click!
This improves the overall speed of your game including frame rate drops and lag spikes as well as alt tabbing out of games faster. You generally land up with a more responsive gaming experience.
Simply ‘Press to Boost’ and changes will be made. These changes made are temporary and revert back once you reboot your Windows computer. Alternatively, if you click the ‘Restore’ button, all services, processes, apps are restored back, including your open browser windows, if any!
It is thus completely safe with no permanent changes made to your Windows PC.
Features:
- Safe and simple to use – 1 click Boost
- No Permanent changes
- No Overclocking
- Smoother game play
- Noticeable Results
- No interruptions
- Reduces Lag
- More stability for your games
http://www.gzero.com/gboost/home.html
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So I installed this on my desktop that runs FFXIV, right? After using the Boost mode, the performance of Final Fantasy XIV DRAMATICALLY improves!! NOT LYING! Seriously, the lag IS fixed by using this software! 
Try it out yourselves!!
