Quicktime

Hi dorianlevy,

Welcome to the Support Communities! If you are having trouble installing Quicktime and iTunes on Windows Vista, follow the troubleshooting steps below:

"Could not open key" message when installing iTunes or Apple components for Windows - Apple Support

http://support.apple.com/en-gb/HT203460

Reregister the Windows Installer service

You might see this message if your Windows Installer service registration is corrupted. Reregister the Windows Installer service using the steps below:

1. Start your computer in Safe mode:
   • Restart your computer while holding down the F8 key.
   • When the Windows Advanced Options Menu (XP) or Advanced Boot Options (Vista and Windows 7) appears, use the arrow keys to select Safe Mode.
   • Press Enter.
2. Log on to the computer with your administrator password.
3. Open the Command Prompt.
   • Windows XP: From the Start
     menu, choose All Programs > Accessories
     >
     Command Prompt.
   • Windows Vista and Windows 7: From the Start
     menu, choose All Programs > Accessories, then right-click Command Prompt. Select "Run as administrator" from the shortcut menu.
   • At the prompt, type each of the following lines. Press Enter after each:

     msiexec /unregister
     msiexec /regserver

4. Close the Command Prompt window.
5. Install or remove the Apple software that first caused the message to appear.

If the issue persists, continue below.

Reset Windows Security Settings

If reregistering the Windows Installer service didn't work, you might be able to resolve the issue by resetting your Windows Security settings. Learn more: How do I restore security settings to a known working state?

Additional information

If you continue to receive the message, contact Windows support.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Risks are inherent in the use of the Internet. Contact the vendor for additional information.

Last Modified: Nov 8, 2014

Issues installing iTunes for Windows - Apple Support
http://support.apple.com/en-gb/HT201668

Issues installing iTunes for Windows

Learn how to resolve issues when installing iTunes for Windows.

1. Make sure you have an administrator account.
   To install iTunes, you'll need to log in to your computer with an administrator password. If you're not sure if you have an administrator account, read Windows 7: How do I log on as an administrator? You could also refer to your computer's help system, contact your IT department, or visit support.microsoft.com for assistance.
   
2. Install the latest Microsoft Windows updates.
   To download the latest updates, visit the Microsoft Windows Update website. iTunes for Windows requires Windows XP, Windows Vista, Windows 7, or Windows 8 with the latest Service Pack installed. If you can’t install the updates, refer to your computer's help system, contact your IT department, or visit support.microsoft.com for assistance.
   
3. Download the latest version of iTunes.
   The latest version of iTunes can be downloaded at http://www.apple.com/itunes/download/.
   
4. Repair a previously installed version of iTunes.
   If iTunes is already installed on your computer:
   • Search for iTunesSetup or iTunes64Setup on your computer.
   • Right click on the file.
     • Windows Vista, Windows 7, and Windows 8: Choose "Run as administrator."
     • Windows XP: Choose Open.
   • Click and follow the wizard to repair iTunes.
     
5. Remove iTunes from your computer.
   Remove and reinstall iTunes and other software components for Windows XP
   Remove and reinstall iTunes and other software components for Windows Vista, Windows 7, or Windows 8
   Songs you bought from the iTunes Store or imported from CDs are saved in your My Music folder by default. They won't be deleted by removing iTunes.
   
6. Disable conflicting software.
   Some Windows background processes can cause issues for other programs and processes. These conflicts can prevent applications, such as iTunes, from installing. Disable conflicting processes by starting your computer using MSConfig:
   • Using Msconfig to troubleshoot conflicts in Windows XP
   • Using Msconfig to troubleshoot conflicts in Windows Vista, Windows 7, and Windows 8
   Some security software made by other companies can't be disabled using MSConfig. If you've installed security software and you're having issues installing iTunes or QuickTime for Windows, you might need to disable or uninstall security software to resolve installation issues.
   
7. Restart your computer.
   
8. Install iTunes.

Additional assistance

If the steps in this article don't help you resolve the issue, you might be able to find a solution through a search of the Microsoft support website.

If you've received errors regarding inaccessible registry keys during installation, try the steps found in "Could not open key" message when installing iTunes, QuickTime or Apple components for Windows.

Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Risks are inherent in the use of the Internet. Contact the vendor for additional information.

Last Modified: Jan 14, 2015

I hope this information helps ....

- Judy