Itunes wont start

Hi,
I've recently tried to install itunes 6. During the installation process it looked like everything was going well but at the 'installation successful' screen the windows send error report window appears. I close that window and click finish to complete installation. When i then try and start up itunes the send error window appears again and itunes can not start.
I have tried to start up quicktime on its own as it appears to be the villian. (based on what ive read in other posts) But i get the following message 'the following file does not exist or is not a valid uninstallation file. c:\windows\system32\quicktime\uninstall.log' so i can't uninstall.
When i try and install a standalone version of quicktime 7.0.2 i get this error - 'a newer version of quicktime is already installed...'
I've tried installing with my firewall disabled. Ive tried editing the registry. Windows install cleanup does not detect the quicktime installation.
I'm out of ideas. Help!
Dave.

hi drooks!
When i try and install a standalone version of quicktime 7.0.2 i get this error - 'a newer version of quicktime is already installed...'
hmmmm. itunes 6.0.x needs at least QT 7.0.3 to run. the 7.0.2 install won't be going through because it seems like there's a corrupted QT 7.0.3 installation gumming up the works for you:
But i get the following message 'the following file does not exist or is not a valid uninstallation file. c:\windows\system32\quicktime\uninstall.log' so i can't uninstall.
... but this particular QT error message actually tends to respond better to brute force than finesse.
so we won't uninstall the QT first. we'll just try a careful standalone QT 7.0.3 install directly "over top" of your existing QT.
download and save a copy of the QT 7.0.3 to your hard drive. (we'll run the install from there rather than online.) switch off all antivirus and antispyware applications prior to the install.
http://www.apple.com/quicktime/download/standalone.html
will itunes launch properly after that?
keep us posted.
love, b

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Okay. I'm still wondering about your firewall. A "persistent" iTunes.exe in your processes is most consistent with a firewall blocking iTunes, iTunesHelper and/or QuickTime from accessing the Internet. (Norton Internet Security 2005 is by far the worst offender in this regard, but it can be produced both other firewalls too.)
Head into the Firewalls settings and make sure that iTunes, iTunesHelper, and QuickTime are all being allowed full access to the internet.
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Hi, i had a look on this answer to a topic : itunes wont start :
+The QuickTime problem is most likely causing the iTunes launch problem. So let's try swapping out your QuickTime again taking a few additional explicit precautions.+
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+Next, we’ll manually remove any leftover program files and folders.+
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but when it comes to install/uninstall an error comes out : An error ocured while installation
Let's try getting the program uninstalled by other means then.
Download and install the Windows Installer CleanUp utility:
Description of the Windows Installer CleanUp Utility
Now run the utility (“Start > All Programs > Windows Install Clean Up”), select any QuickTime entries in the list of programs that appears in CleanUp, and then click “Remove”.
Next, we’ll manually remove leftover program files and folders.
1. On the Start menu, click My Computer (or double-click My Computer on the Desktop).
2. In My Computer, open Local Disk.
3. Open Program Files.
4. Right-click on the QuickTime folder and click Delete from the shortcut menu.
5. Navigate to C:\Windows\system32\.
6. Remove the files QuickTime.qts and QuicktimeVR.qtx. (If “Hide filename extensions for known file types” is enabled on the PC, then those two files will appear as “QuickTime” and QuickTimeVR”.)
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