Unable to install windows 7

I try to install win 7 but when it restarts it jams on the "Starting Windows" place.
I have a pentium 4 cpu 1.70 GHz, 1GB RAM, 128 MB video mem, 30 GB HDD EXCELSTOR.
Please help.

Run the Windows 7 Upgrade Advisor

It said my system is ready for installation, but still the same prob and I also tried starter version but it also jammed.

Where did you get Win7? Did you burn a DVD yourself? If so confirm ISO source and burn to DVD using ImgBUrn at 4x speed.

Unplug all other HD's and peripherals to try install.

Enter BIOS setup to reset to defaults: Clear CMOS - 3 Ways to Clear the CMOS - Reset BIOS.

Test your RAM and HD: You can burn to CD or write to flash stick Hiren’s BootCD to boot to test the HD with the maker's diagnostics, Check File System after making a full disk partition with Partition Wizard, test your RAM with memtest86.

I purchased it from a Shop.
And the Ram and HD are working great.

Try the other steps and report back for more.

Still same.

And also I get an error when booting from the dvd saying" cannot boot from cd code 5"