One of the major disadvantages of PC games over console games is that many PC games require certain specifications in order to play correctly. Recent PC games, like "Crysis" or "Just Cause 2" have very high PC requirements in order to play correctly. If you find that your PC game is running too slowly or the graphics are muddy and blurred, you can take several steps, some which involve upgrading your computer entirely, to get it running at optimal speed.
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Tweak the game's graphics using the graphics options off of the game's "Options" menu. Here, you can usually adjust the graphical output of the game, including turning off shadows or lowering the texture resolution. This will result in a game that is not as graphically detailed, but may run much smoother and faster on your computer.
Close out all other programs while playing the game. If a program like Internet Explorer or Windows Media Player is running in the background, the computer will try to process it and the game simultaneously, causing frame rate issues and other graphical glitches. On some occasions, the computer may even seize up, forcing you to manually restart it.
Add some RAM. Many modern computers come standard with about 2 gigabytes (GB) of RAM, or virtual memory, which is what the machine uses to process multiple programs. Many PCs have additional slots where you can insert extra RAM, which is available relatively inexpensively from electronics retailers. Increasing the RAM will not only increase your game's speed, but improve the graphics overall. The minimum for most games is 2GB of RAM, but many gaming PCs employ at least 4GB of RAM.
Upgrade your graphics card. Many stock PCs don't even come with graphics cards, which are capable of processing your game's graphics and allowing you to play the game at its fastest speeds with its best texture resolution. Popular graphics cards manufacturers are ATI with its Radeon lineup and Nvidia with its GeForce lineup. Graphics cards usually go into the computer's PCI card slot, but different cards will come with different installation instructions.