Strange Install Problem

I have had Windows 7 Home premium running on my PC for a few years now.
I formatted my HDD and installed Windows XP proffesional with service pack 3, this runs normally.My problem is that when I try to install Windows 7 I only get as far as "starting windows" then the PC freezes.I get windows is loading files ,then starting windows and thats it.I downloaded another win 7 home premium DVD and tried that and I even downloaded windows ultimate and tried that but they all do the same thing ? I thought it may have something to do with my GFX or Mobo drivers so I tried to install my GFX and Mobo drivers again but my PC refuses to boot them ? Yes I have set the BIOS to boot from CD and I also tried pressing F12 ( for boot options ) but they still will not load.When I try to load any of these DVDs the PC goes streight into loading Windows XP, It will however boot the XP disk on startup ( but not the Win 7 disk ) I could ( if I wanted to ) install multiple versions of XP but I cant install Win 7.
Any ideas anyone ?

Work through the Steps for Overcoming Windows 7 Installation Failures - Windows 7 Help Forums.

Did you burn the disk with the MS tools using a fresh ISO for your licensed version?

Try resetting the BIOS to defaults, set HD to boot first, then trigger using one-time BIOS Boot menu key.

If you can't access CMD on disk to wipe the HD, try free Partition Wizard
burning ISO to CD using Windows Image Burner, boot, hiighlight target HD (all others unplugged) to Quick Wipe disk from Disk tab.

This should force the installer to autostart.

Actually I was thinking about my problem and the actual problem is that Windows is freezing at the "starting windows"screen because windows is trying to load when it has not been installed yet.
I read my owne post again and if you do the same you will see what I have just pointed out above.
So, the bottom line is.I cant install Windows because the PC thinks that Win 7 is already installed and I cant start win 7 because it is not installed yet.That explains why I get "Windows is loading files" then a freeze on the "Starting windows" screen.I never actually get to the setup screen and I never get asked where I want to install windows.

I gave you the steps to overcome this or any other installation problems. At no time should you be prevented from booting a good installer to delete all partitions or wipe the HD and reinstall.

Please focus on the steps now which have worked in thousands of similar cases.

I also gave you what to do if you cannot boot the disk, even after replacing it.

So are you going to begin the steps now?

Ok I will try what you have suggested.
Thanks.

@gregrocker:
Sorry for the delay in getting back to you,it could not be helped.
In the BIOS I only have the following options that apear to have anything to do with what you have suggested.I am not sure which option to go with.I have:
Standard cmos features
Load failsafe defaults
Advanced BIOS features
Load optomised defaults
I have checked all of these and none of them have the option to do what you have suggested ?!
The only other options in the BIOS is items like.Power management,PC health,Passwords etc

Choose Load Optimized Defaults. Save and Exit.

Continue with the steps in Overcoming Windows 7 Installation Failures - Windows 7 Help Forums
reporting back exactly what happens with each step, skipping none.

The way it works here is we give you steps, you complete each step asking back any questions needed to get it done. Then you report back the results of the step.

Once all steps are completed we will have more if the situation isn't resolved.

Ok,I set the BIOS to Load Optomised Defaults.When I pressed F10 the PC shut down,restarted and went to my motherboard screen.A message came up asking " do you want to....
I could not read the rest as this screen only lasted a very short time.My motherboard is a Gigabyte H55M-UD2H
Alltogether the screen was about 1/4 full with writing.

Went in and out of the BIOS and read what it said.It asked if I wanted to set the SATA controller to AHCI,I clicked on Yes and now when I try to start the PC I go into a continuous loop of Motherboard screen ( with various options ) and Loading operating system BUT it goes from loading operating system back to the BIOS screen.I can go into Win XP but only in safe mode,in fact I had to do that to switch off the PC.
As I can get into XP in safe mode is there something I can do from there ? because I can acess disk management etc.