If you are interested in playing games and using Windows 7, then surely you need to tweak Windows for the maximum gaming performance. I could help you to do that with some suggestions. I am not asking you to do all of them but atleast one of them.
Set up Windows Ready Boost – By setting up the ready boost feature in Windows, you could put some extra RAM in and it could provide some more gaming performance.
Be free from Malwares – You should use a good security software to fight against malwares and being free from malwares, your system can provide a better gaming experience.
Change Aero Theme – Though the Aero theme provides a good look to Windows 7, you could change/switch to any other simpler themes for getting more performance for gaming.
Disable the Sidebar – You could also get rid of the sidebar in Windows 7 so that so that more memory could be contributed for the games to run smoothly.
Adjust for the Best Performance of Applications – You could also tweak Windows 7 for the best performance of applications so that your games could get attention along with other apps.
Change the Power Plan – Setting the power options to high performance can also give good gaming experience.
Find Programs that Slow Down Windows 7 – You could find out which all programs are slowing down your Windows 7 and take proper measures. This could make your games work better.
Turn off Search Indexing – You could also turn off the search indexing feature in Windows 7 for getting more gaming performance.
Disable Windows Defender – If you have other antivirus softwares, then there is no need to waste memory by using Windows Defender.
Disable Excess Windows Services – Disabling the excess windows services which you don’t require is my another suggestion.
With these tweaks, surely you could a wonderful gaming experience with Windows 7.