could not write value itunesHelper to key/SOFTWARE/microsoft/windows/currentVersion/Run.verify that you have sufficient access to that key

are you on admin rights?

looks like rights / permission problem...

you need to be the administrator of the machine...

HT1923: Removing and reinstalling iTunes for Windows Vista, Windows 7, or Windows 8

http://support.apple.com/kb/HT1923

HT1925: Removing and Reinstalling iTunes for Windows XP

http://support.apple.com/kb/HT1925

hope this helps 🙂

1. Press WinLogoKey+R to open the Run... dialog box
2. Type in Regedit and press enter/return
3. Tap the plus symbol next to HKEY_LOCAL_MACHINE
4. Tap the plus symbol next to SOFTWARE
   
5. Press M on the keyboard, then again or scroll down until Microsoft is selected
6. Tap the plus symbol or use the right-arrow key to open the branch
7. Press W on the keyboard, then again or scroll down until Windows is selected
8. Open this branch and find Current Version
9. Tap R and locate Run inside that and select it

The registry editor should now look something like this: (Click to view)

Right-click on the Run key and click Permissions... to see what is going on. My current permissions for the Run key are shown below: Giving Administrators and/or yourself Full Control should be enough to let you make changes.

tt2