First you need a Defragmenting program: http://www.iobit.com/iobitsmartdefrag.html = This is one of the best defragmenter programs out there.
Then you need a program called gamebooster: http://majorgeeks.com/downloadget.php?id=5952&file=15&evp=dc8312b3c3f52e18c69b7584026d7aec = it basically temporarily disables not needed processes and even with your preferred settings ( It won't turn off steam or you anti-virus program ) This is highly recommended for people who have 1GB or less RAM ( This Program would only take less than 20 MB of your RAM while playing in the background )
Then another program that cleans your registries: http://www.eusing.com/free_registry_cleaner/registry_cleaner.htmInstall and run these programs with your preffered settingsIf you have Windows 7 or vista follow these steps:1.Open your start menu then right click on "Computer" and click properties.
2.Click Advanced system settings
3.Under the performance tab you should find 3 options, click the settings button on the box that says Performance.
4.Either check the best performance box ( This will make your PC look like windows 95 ) or check the custom box ( For people who knows how Windows 7 or Vista works)
*Also Make sure that your video card drivers are always updated either through steam or windows updateUpdating your video card through steam (AMD Users only):1.Open Steam Client
2.Click the steam tab on the upper left corner of your window
3.Click "Update AMD Video Drivers"
4.Continue the installation
Updating your video card through Windows Update (For both Nvidia and AMD users):*Note that this will DISABLE YOUR PC TO RUN THE OS IF YOU HAVE CRACKED/A ILLEGAL COPY OF THE OS1.Open the start menu
2.Right click Computer and click properties
3.Click "Windows Update" On the lower left corner of the window
4.Click "important updates" or "optional updates"
5.Check the box that updates your graphics card and click OK
6.Follow the instructions
*Also make sure that you have scanned for viruses because some viruses can make your PC slowPROVEN AND TESTED BY THIS TOAST