Itunes 7 will not install; it hangs in the middle of "registering"

I cannot install itunes 7. It hangs in the middle of "registering" and will not proceed any further. Can anyone please help me? I am so frustrated! Thank you very much.

I spent 6 hours last weekend with this installation problem and came up with a process that seems to work - I've posted it a number of times and no one has said it failed for them. Lots of people have said it worked.
First go to Control Panel, Add or Remove Programs and uninstall Quicktime and iTunes.
Next go to the Microsoft web site below and download the Windows Installer Cleanup Utility. Install it, run it, then uninstall Quicktime and iTunes with it, if they appear in the list.
http://support.microsoft.com/default.aspx?scid=kb;en-us;290301
Go to apple.com and download the iTunes setup to your hard drive.
It doesn't hurt to disable or pause your virus scanner before installing, just remember to enable it again when you're done.
Try installing iTunes. You might still have problems installing iTunes because of QuickTime registry key access errors. If that happens, go to the link below, scroll about half way down and CAREFULLY follow the steps to change both Owner and Permissions on the keys that fail.
http://discussions.apple.com/thread.jspa?threadID=688433&tstart=0
NEVER DELETE REGISTRY KEYS MANUALLY USING REGEDIT!
If this doesn't work, please re-post your problems. The more information we have to work with, the better we can understand the flawed installation process apple uses for iTunes and Quicktime and we can come up with solutions. It seems that the install problems are really with Quicktime rather than iTunes.

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