update 11.1.4 won't install on my laptop. Now I can't get iTunes to work at all.

that was the last set of instructions i tried with no avail. Ive been following and trying the advice from this thread all weekend, and nothing.

Remove all of these items in the following order:

iTunes

Apple Software Update

Apple Mobile Device Support

Bonjour

Apple Application Support

+ Apple compatibilities

+ iCloud

It seems that the new iTunes would not erase properly the old archives in order to install the new ones. iTunes 11.1.4 is 142mb compared to 122 to the earlier download. This must be compatible to Windows 8.1

Zittx

Tried almost everything for uncountable times. I get the following message:

Trying to install the extracted AAS installer I get the message

saying that there is a newer Version allready installed. Although I cannot find it, neither in the control pannel nor in any libary or folder.

******!

Does anyone have the same problem or better a solution?

When I try to install iTunes 11.1.4, I get error message "Error writing to C:\...\Mobile Device Support\AppleMobileDeviceService_main.dll. Verify that you have access to that directory." Also, I am unable to do anything to that file, in spite of the fact that there is only one account on my laptop and it is an administrator account.

I can't uninstall any of the programs listed by Zittx. For each one I get an error message "Error opening installation log file. Please verify that the specified log file location exists and is writeable." No log file location is specified. I'm running Windows 7 with all updates installed.

I have found a temporary solution, allowing the previous version of iTunes (v. 11.1.3 (x64) in my case) to be re-installed. It will allow you to re-establish use of iTunes until the Apple software engineers fix the most recent disasterous upgrade (v. 11.1.4). Please see and follow the procedure in the following article:http://smallbusiness.chron.com/reverting-previous-version-itunes-32590.html The previous version works beautifully.

I had the same hastle as you did. Be patient...

DO ALL AGAIN!

First do this:

Should you get the error iTunes.exe - Entry Point Not Found after the above reinstall then copy QTMovieWin.dll from:

C:\Program Files (x86)\Common Files\Apple\Apple Application Support

and paste into:

C:\Program Files (x86)\iTunes

The above paths would be for a 64-bit machine. Hopefully the same fix with the " (x86)" omitted would work on 32-bit systems with the same error.

Remove all of these items in the following order:

1. iTunes

2. Apple Software Update

3. Apple Mobile Device Support

4. Bonjour

5. Apple Application Support

6. Apple compatibilities

7. iCloud

Reboot, download iTunes, then reinstall, either using an account with administrative rights, or right-clicking the downloaded installer and selecting Run as Administrator.

Zittx

I'm afraid my earlier advice to copy QTMovieWin.dll was premature. The revision is below...

Should you get the error iTunes.exe - Entry Point Not Found after the above then search the computer for copies of the file QTMovieWin.dll - you should only have one copy in the relevant folder for your system.

C:\Program Files\Common Files\Apple\Apple Application Support (32-bit Windows)

C:\Program Files (x86)\Common Files\Apple\Apple Application Support (62-bit Windows)

Delete any others and this should not only fix the problem, but prevent it from recurring on subsequent updates.

tt2

Thanks Jim, your advice got Itunes working for me. Cheers!

Just wanted to thank-you for your helpful and clear advice on the latest iTunes update fiasco. Your advice worked though I had to uninstall Quicktime, Safari and iCloud control panel as well before I could delete the Apple folder in Common Files (x86).

The reinstall was sucessful and iTunes is up and working- it even mamaged a sync with my iPhone, by no means guaranteed nowadays!

Thank-you once again.

turingtest2- thanks for your great advice- up and running again.

I've been uninstalling and re-installing all of the components listed in the previous posts, but nothing seems to be working for me. I running Windows Vista 32-bit and whenever the installation reaches the point where the Apple Mobile device can't start. I am logged in as an admin and I ran the installation as admin...nothing seems to be working. I guess I just have to wait for the next update.

I have the same operating system as you and ive done all the same things and after i finally get done and reinstall itunes, when i try to open it nothing happens.

I also ran into multiple errors when updating to iTunes 11.1.4.62 latest update. Here is how I solved the problem. Take care when doing registry edits and back up your registry before you begin.

1. Follow the uninstall instructions on Apple Support at http://support.apple.com/kb/ht1925 ...(a) followed the order of uninstall, (b) delete all the folders as instructed

2. I could not get Apple Mobile Device Support to uninstall. I even tried some 3rd-party uninstallers to no avail.

3. Started regedit (be cautious about editing your registry...you can make your system unbootable) and did a search for all instances/types (keys, values, data, etc of Apple Mobile Device Support and deleted everything regedit found found.

4. Ran CCleaner (www.piriform.com) and told it to "Fix" all registry errors (selected OK to back up registry).

5. Rebooted and verified that Apple Mobile Devices was no longer listed in the "View Installed Programs" list.

6. Downloaded the latest installer for iTunes and ran it.

7. It installed perfectly. No issues.

It seems the trick it to ensure that the Apple Mobile Device Support is completely removed from your registry and program tree. Best of luck.

Thing is in not getting any errors anymore, and no issues uninstalling anything. Just when I get done reinstalling iTunes. It doesn't respond.

I've got the same problems. I've followed all these "fixes" and have tried 5 times now and still the same crap....