Unable to install itunes Win 7, 64 bit. Error: " Could not open key: UNKNOWN\Components\DA42BC89BF25F5BD0AF19C3B9B1A1EE8\C0B7E33AC99B9CE47B20A823B861A19F. Verify that you have sufficient access to that key. or contact your support personnel.

I can only add that I have had the same error message trying to install iTunes 10.5 on an HP, Win7, 64 bit machine. I posted my request for help some 10 days ago w/o reply.

I'm getting the same error, also on an HP Win 7 64 bit machine...anyone find a fix? I've tried older versions and uninstall/reinstall.

These ones are tricky. But the following instructions are worth a try.

First do a complete uninstall of iTunes and related components (but don't reinstall just yet), as per the following document:

Removing and reinstalling iTunes, QuickTime, and other software components for Windows Vista or Windows 7

a. Launch regedit (Start >> Search Programs and Files >> type Regedit and open the regedit that comes up.)

b. Access the following Location: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData \S-1-5-18\Components

c. Perform the following actions

i. Right Click on Components Folder

ii. Select Permissions

iii. Select Full Control and Read Permissions options

iv. Select Advanced Button

v. Select Owner Tab

vi. Select to Change Owner to the Administrators

vii. Check the option “Replace owner on subcontainers and objects”

viii. Select OK when prompted that it may not change all.

ix. Select Apply

x. Select Apply again

xi. Exit the Registry Editor

Now try reinstalling iTunes again. Does it go in properly this time?

NCPlater to all haveing the error: ***I HAVE THE ANSWER***

iTunes

Could not open key:

UNKNOWN\Components\DA42BC83BF25F5BDOAF18C3B9B1A1EE8\3e43b73803c7c394f8a6b 2f0402e19c2. Verify that you have

sufficient access to that key. or contact your support personnel.

After following instructions for three different solutions that did NOT work; I found the solution that did work

on the support site for Syamntec.

Readers - Please, you must be VERY familiar with pc jargon and windows vernacular to accomplish the reset

of ALL the permissions in your registry.

Follow the ditrections below and pay attention to the notes for those running 64bit Win7.

• Step one, back up the registry.
• Step two, go to the MS KB: http://www.microsoft.com/downloads/details.aspx?FamilyID=e8ba3e56-d8fe-4a91-93cf -ed6985e3927b&displaylang=en and download the file that installs subinacl. It is an MSI file, and will do a quick install of a few Microsoft files. Hint: Look in the folder listed below, "subinacle.exe" may already be there.
• Step three, create a batch file (subinacle.bat) with the following commands: (Use Notepad - copy & paste, not the red stuff)

cd /d "Program Files\Windows Resource Kits\Tools" (only for 32bit/x86 machines)
subinacl /subkeyreg HKEY_LOCAL_MACHINE /grant=administrators=f /grant=system=f
subinacl /subkeyreg HKEY_CURRENT_USER /grant=administrators=f /grant=system=f
subinacl /subkeyreg HKEY_CLASSES_ROOT /grant=administrators=f /grant=system=f
subinacl /subdirectories %SystemDrive% /grant=administrators=f /grant=system=f
subinacl /subdirectories %windir%\*.* /grant=administrators=f /grant=system=f
secedit /configure /cfg %windir%\inf\defltbase.inf /db defltbase.sdb /verbose

For 64bit machines substitute for first line of bat file:

cd /d "c:\program files (x86)\windows resource kits\tools"

• Step four, run the batch file. Let it run until the Command Prompt screen closes, may take 30 minutes or more.
• Step five, reboot the machine and run the install again.

Ladies and Gentlemen; this worked for me and allowed immediate installation of two application packages I had been trying for three months! (Including ITunes 10.5)

Thanks NCPlater!!! The subinacle solution (with the scary batch file) fixed the problem!! Thanks again for the tip!