How can I make computer games run better on my pc?

A few months ago I bought a brand new dell, and games have always run pretty crappy on this computer, and I just bought Call of Duty 5 and it runs awful. Everything is going in slow motion and it takes a minute to move the mouse across the screen. How can I adjust my computer to make it run games better?How can I make computer games run better on my pc?
Most of those out of the box PC's are full of crap hardware they use cheaper motherboards memory and cpu's slower hard drives not to mention most of them use on board video %26amp; sound you need to do some upgrading I never suggest out of the box Pc's for gaming you should always go to a local shop and they will be able to suggest hardware. Pc's like Dell and Hp are more for basic home use unless you can specify your needs. That is why they are most of the time cheaper.
Buy a better video card and up your memory. And remember if you have a Nvidia card now, set your bios to on board graphics and plug your monitor into the motherboard so that you can Remove the Driver from the Installed Programs. Then proceed to run your new video card driver disc and swap your monitor plug back to the video card.How can I make computer games run better on my pc?
close all unwanted application ( you may be running anti virus scanning in background without your notice if you have given such settings)

for checking plz press Ctrl+Alt+del key at same time if you are working in windows . this will open taskmanager check application end unwanted application.

change setting of your windows to besPerformancece your setting may be in best appearancece. add more RAM , and if you can stop some services of system those are not necessary you can improved speed.

You can change registry setting but i will not give directly here plz send mail to akhtar_ali73@yahoo.com
make shure your not running any other programs when u play the game, and if its still slow, u will need to upgrade your ram and graphic cardHow can I make computer games run better on my pc?
Improve your hardware (GPU, CPU, RAM)



Or lower your settings.
Sounds like you need a decent graphics card.