So, here is my problem - When my computer is started and ready to work, and I try to launch a game/program, he freezes for 10-20 minutes before starting the program. I think that the problem appeared for the first time when I installed a game from 1996, called EarthSiege II. Every time I played that game, the colors of my computer started to go crazy (red was dark blue, blue was gray, pink was white etc.). After I was done playing, I experienced the problem and I formatted all my computer drives and reinstalled windows, but the problem still exists. Can someone tell me what to do please. I think the problem  is coming from my video card.
I am using Nod 32 as my antivirus. I don`t think that this is a hardware related problem. Probably this game is running something in background, if you have this problem after uninstalling the game than you have only 1 option, to reinstall the OS. Quote from: AnticGod on November 15, 2009, 09:23:01 AM

I don`t think that this is a hardware related problem. Probably this game is running something in background, if you have this problem after uninstalling the game than you have only 1 option, to reinstall the OS.

...After I was done playing, I experienced the problem and I formatted all my computer drives and reinstalled windows, but the problem still exists....

... if you have this problem after uninstalling the game than you have only 1 option, to reinstall the OS.

I think that the problem appeared for the first time when I installed a game from 1996, called EarthSiege II. Every time I played that game, the colors of my computer started to go crazy (red was dark blue, blue was gray, pink was white etc.). After I was done playing, I experienced the problem and I formatted all my computer drives and reinstalled windows, but the problem still exists.

Did you reinstall that game when you reinstalled Windows?

i think your graphic card is the problem..
try to use other video card.

I reinstalled the game BEFORE reinstalling windows. Oh and before I reinstalled windows I formatted the hard disk which means that I deleted every file on the computer.

I know you installed it BEFORE reinstalling windows.  My question was obviously referring to AFTER reinstalling windows. 

And another thing that worries me is that my CPU Usage is 100% non-stop.

my CPU Usage is 100% non-stop. I stopped most of my programs, even the antivirus and it kinda fixed, but not fully, it freezes every 5 min for 1/2 sec.

Oh.. sorry No, I did not reinstall the game.
Hmm.. I dont have a spare video card to try. And another thing that worries me is that my CPU Usage is 100% non-stop. I stopped most of my programs, even the antivirus and it kinda fixed, but not fully, it freezes every 5 min for 1/2 sec.

1.Exactly what program is hogging CPU resources?  Look at the list in Task Manager.  You should be able to determine from that. 

2.What make and model is your computer?  Does it have onboard video, even though you are apparently using an add-on video card?  How old is your computer?  Can you give us some details about the power supply?

What kind of OS are you running, and how much memory does your machine have.

Open task manager to the processes tab. Double-click on the CPU title to sort on that column with highest usage at the top. When the CPU is spiking, which process is chewing the cycles?

check up your cpu temp at bios
if it gives you high temp then change your fan before it burns your processor too.
too high temp can make your unit so slow.

check also in your disk if there is autorun.inf this malware can be the cause too.