Trying to Install Windows 7 in Place of WIndows Vista - Error 0xC0000005 - How Do We Work Around?

My girlfriend has a computer with WIndows Vista that has exhibited "bad image" error messages upon the load of each and every executable.  Her apps. work after clicking through the several "bad image" messages, but we decided to load WIndows 7 and get rid of Vista in the process.  

We loaded the Windows 7 installation CD, but at installation we received the message "Windows installation encountered an unexpected error. Verify that the installation sources are accessible, and restart the installation.  Error code: 0xC0000005".

We purchased and ran a product called "RegCur" over the system, as its specific product claim was it could resolve this particular error.  It did not; we still received the same error.  The error prevents the Windows 7 installation process from proceeding, so we are stuck.

We want to load the WIndows 7 OS, and get rid of Vista.  How can we work around this error or resolve it so that we can achieve our goals?  Thanks.
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☠ MASQ ☠Commented:
Assuming you don't want to retain any of the data from the Vista installation which Windows 7 install DVD do you have?
Are you booting from the DVD or launching the upgrade from Vista?
My suggestion is to backup her doc's and favorites etc,. Then install windows 7 as a fresh install and not as an upgrade install.
Now obviously any installed programs will not be there but at least it will be working properly. She can install programs back onto it as needed.
Have you tried doing a clen install. This is formatting your hard drive and installing windows 7. Of course backup you important data before formatting the hard drive. But that should install windows 7 without the error code. i only recommend this for the full version of windows 7 rather than the update install of windows 7.

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AccessHackAuthor Commented:
Thank you for your suggestions.  We have a full version of Windows 7 to install.  Will you please explain the steps for performing a "clean install" or "fresh install"?  I have to think it is pretty simple but I am not familiar with her system and I want to do this correctly.  Thanks.
☠ MASQ ☠Commented:
Change the boot order on the PC so it boots from the DVD drive first.
Then start the PC with the Win7 DVD in that drive
It should then go according to this
If it doesn't let us know at what point you get a problem and any error messages.

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AccessHackAuthor Commented:
MASQUERAID, thanks for your help; the process sounds much as I expected.  We'll give it a try and let you know how it goes.  Thanks to everyone.  
just to clarify a clean install and a fresh install are the same thing, if you need any other help let us know, btw you can download magicaljellybean keyfinder from the sourceforge website and when your doing your backup run it and it will try to retrieve any program serial keys that were installed for different programs on the computer. then you can save that info to a text file should you need it.
AccessHackAuthor Commented:
Thanks for your help; we installed Windows 7 without a hitch.  Goodbye, Vista!
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