- Press WinLogoKey+R to open the Run... dialog box
- Type in Regedit and press enter/return
- Tap the plus symbol next to HKEY_LOCAL_MACHINE
- Tap the plus symbol next to SOFTWARE
- Press C on the keyboard, then again or scroll down until Classes is selected
- Tap the plus symbol or use the right-arrow key to open the branch
- Press i on the keyboard, then use the Page Down key, scroll bar or arrow keys to locate iTunes.aifc
The registry editor should now look something like this: (Click to enlarge)
Right-click on the iTunes.aifc key and click Permissions... to see what is going on. My current permissions for the iTunes.aifc key are shown below: Giving Administrators and/or yourself Full Control should be enough to let the installer make changes. Alternatively you could delete the key and let the iTunes installer recreate it.
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