ITunes and Quicktime won't start up.

I've tried installing and re-installing iTunes about three times now, and each time it'll seem to have installed successfully, but whenever I try to tell the program to start up, it just literally does nothing. I tried to uninstall Quicktime it starts the uninstall, then comes up with an error saying "Fatal error during" with no other text. I click Ok, the window closes and the uninstall is cancelled, with nothing being changed. please help

*Replying to eddy*
An exception occurred while trying to run “C:\WINDOWS\system32\shell32.dll,Control_RunDLL“C:\WINDOWS\system32\QuickTime.c pl”,QuickTime
Perfect! Thank you eddy.
Okay, we're not just dealing with a broken QuickTime here. Some other application (of the same general type that I asked about earlier, or possibly a game) has installed older versions of QuickTime program files in your \system32\ folder. That's what is causing the QuickTime (and iTunes) launch problems, and it's also interfering with your QuickTime uninstalls (producing that fatal error message). So we're going to have to clean that stuff out as well (or else your QuickTime and iTunes are still not going to launch, even after we've fixed your QuickTime).
Preliminaries
Download and save a fresh copy of the QuickTimeInstaller.exe (QuickTime installer file) to your hard drive. (Don't try to run the install on line, and don't start the install just yet.) Get the QuickTime installer that doesn't mention iTunes:
http://www.apple.com/quicktime/download/
*Uninstall and clearing program files and folders phase*
Download and install the Windows Installer CleanUp utility from Microsoft:
http://support.microsoft.com/kb/290301
Now run the utility ("Start > All Programs > Windows Install CleanUp"). In the list of programs that appears in CleanUp, select any QuickTime entries, and click "Remove". Quit out of CleanUp.
Now we'll clear away the leftover QuickTime program files and folders.
Open My Computer. Go "Tools > Folder Options" and click the "View" tab. Make sure that "Show hidden files and folders" is selected and that "Hide extensions for known filetypes" is unchecked. Okay out of the Tab.
Now open "Local Disk (C:)" or whichever drive your Program files are installed on.
Open the "Program Files" folder.
Right-click on the QuickTime folder and select "Delete".
Go back into My Computer and open your C drive.
Open the "Windows" folder.
Open the "system32" folder.
Look for any files or folders with Quicktime in the file name. Delete any such files/folders that you find. (Can't tell you precisely what to look for, because what QuickTime componentry gets dumped in there depends on which program did the dumping.)
Now empty your recycle bin and restart the PC.
*Reinstall phase*
Don't open any other applications after the restart. Now start the reinstall by doubleclicking the QuickTimeInstaller.exe file you downloaded earlier.
Does that install go through okay? If so, do QuickTime and iTunes start launching again?

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    I had the same problem with the previous version of iTunes. Now I'm trying to install the latest iTunes downloaded from the Apple's site.
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    Many thanks. Yes, let's first try uninstalling the ACE pack and seeing if iTunes will launch now.
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    hi Double_Duce!
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    Have a look at this article in the Apple Knowledge Base.
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  • ITunes and Quicktime crash on start.

    Okay, I've been struggling with this one for days.
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    Application Timestamp: 4afca401
    Fault Module Name: StackHash_0a9e
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    Fault Module Timestamp: 00000000
    Exception Offset: 0b003ad4
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    Exception Data: 00000008
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    Locale ID: 1033
    Additional Information 1: 0a9e
    Additional Information 2: 0a9e372d3b4ad19135b953a78882e789
    Additional Information 3: 0a9e
    Additional Information 4: 0a9e372d3b4ad19135b953a78882e789
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    Application Timestamp: 4afa5828
    Fault Module Name: QuickTimePlayer.dll
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    Fault Module Timestamp: 4afa5820
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    Locale ID: 1033
    Additional Information 1: ace3
    Additional Information 2: ace3c919134bd639a372b1f9b8909b7b
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    Hi there Aideed,
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