Issue finalizing Win 7 Installation

Ok heres my situation. I have a e9120 HP Pavillion elite or rather its my dads. I wanted to upgrade to win 7 from vista and decided to do a clean install. I pop in the cd and delete all the partitions and then create a new one and select it as the installation source. It goes through the whole loading files and installing then it says set up needs to reboot to continue installation. It restarts and loads some files, then i see the windows logo, after that the screen turns black. I can see the mouse curser and move it but it stays at that black screen. Note this isnt the curser at post. I have done the installation 3 times and the same result it stays at that black screen. This is odd considering its never happened to me and I have done a lot of installations. Tried to get an answer at the hp site but so far nothing came here seeing as las ttime I posted here I got great help on my build that was having issues. I hope someone can help me. One more thing i did run the win set up and selected repair and it ran a test it detected nothing wrong and said boot succesful and no errors detected to fix. I am able to see the Windows will now guide you through first start up, but only if i run the pc in safe mode though it makes me restart seeing how it wont complete or it doesnt allow it to run in safe mode.

May We get the system specs of the e9120 HP Pavillion.. well I should say.. have you done any upgrades to this computer.

2nd.. I see that you have specs in the "My System Specs" page... are those system specs pertaining to this particular computer or are they two completely different computers.

Once we know the specs you have.. it will clear up some things

oh sorry didnt put the specs the specs on my profile is for my custom built pc. The pc HP pavillion is pretty much the original nothing modified. here are the specs for this pc
Chipset: NVIDIA GeForce 9100
AMD Phenom II X4 910
Memory 8gb
ATI Radeon HD4350
These are taken from official site HP Pavilion Elite e9120f Desktop PC Product Specifications HP Pavilion Elite e9120f Desktop PC - HP Customer Care (United States - English)

Try installing with only 2gb of ram.

If you can get into Safe Mode, check the Device manager to see if any drivers are in error (!) to update them from optional Windows Update (in Safe Mode with Networking) or from the Support Downloads webpage for your model computer.
Device Manager - Access During Windows 7 Installation - Windows 7 Forums
Driver Install - Device Manager - Windows 7 Forums

Another reason why completed installation won't boot to desktop sometimes is if the display is ported to a TV card, projector or something other than a VGA monitor. When it loads the driver for the TV card, it may be cutting off the monitor and outputting via the TV card, projector, etc. causing the monitor screen to go blank.

If you choose to reinstall, this time wipe the HD of all code, make sure you have the latest BIOS version, if so reset the CMOS, and set SATA controller in BIOS setup to AHCI to try install. Clear CMOS - 3 Ways to Clear the CMOS - Reset BIOS

Thank you very much for the device manager tip. I never knew you could access it through safe mode win installing a new system. Went into device manager and decided to disable video card and restarted. It was working it finally let me complete set up. Thank you everyone for the tip and for showing me something new to learn.