Doom 3 Wont run

[TarheelsCubs]

Hey,

I have been having the same problems since I purchased my PC last Dec. I put the four "original" disks in my drive to load the game on my PC. It then asks me to put the play disk (disk 1) into the drive after installation is completed. An error message then pops up that reads "unable to authenticate original disk within time limit" so I then click retry to give it another shot. Then a new error message pops up that reads " Please insert the original disk instead of a backup, see www.securom/copy"". What???? I bought this game at Wal Mart! It is an original disk. I have never been so frustrated in my life! The game I am trying to play is "Knights of the Old Republic" I have purchased other games and have the same problem. I have downloaded all of the patches, called tech support for Lucas arts and HP. They have done nothing!

The specs for my computer are as follows:

Pent 4 HT 3.4 GHz
1.0 GIG RAM(PC3200)
128 MB GeForce FX 5600
250 GB Hard Drive

Everything passes requirements

I read in one of the threads here about Daemon tools? What are these? Are they programs that came with my computer? I purchased this game and I should be able to play it. I also payed an arm and a leg for this stupid computer. I expect any game I buy to play. Sorry about the rant but I am just so mad right now. If someone hear could help me I would appreciate it gladly. Theres just one thing, if u can help me explain it so I can understand, I am a little bit slow ok! Use terms I can understand please.

Thanks alot in advance!

Jeff