ITunes wont start up

Question

Hi, i had a look on this answer to a topic : itunes wont start :
+The QuickTime problem is most likely causing the iTunes launch problem. So let's try swapping out your QuickTime again taking a few additional explicit precautions.+
+Head into your Add/Remove programs. uninstall QuickTime.+
+Next, we’ll manually remove any leftover program files and folders.+
+1. On the Start menu, click My Computer (or double-click My Computer on the Desktop).+
+2. In My Computer, open Local Disk.+
+3. Open Program Files.+
+4. Right-click on the QuickTime folder and click Delete from the shortcut menu.+
+5. Navigate to C:\Windows\system32\.+
+6. Remove the files QuickTime.qts and QuicktimeVR.qtx. (If “Hide filename extensions for known file types” is enabled on the PC, then those two files will appear as “QuickTime” and QuickTimeVR”.)+
+7. Restart your computer.+
+Next, we'll get a fresh copy of QuickTime into your PC by doing a repair install of itunes.+
+Switch off antivirus and antispyware applications prior to the repair install.+
+Go into Add/Remove and select itunes. Click "Change" and then click "Repair".+
but when it comes to install/uninstall an error comes out : An error ocured while installation
and i cant get rid of it. Pls help. Any ideas? Thx. J

Answer 1

but when it comes to install/uninstall an error comes out : An error ocured while installation
Let's try getting the program uninstalled by other means then.
Download and install the Windows Installer CleanUp utility:
Description of the Windows Installer CleanUp Utility
Now run the utility (“Start > All Programs > Windows Install Clean Up”), select any QuickTime entries in the list of programs that appears in CleanUp, and then click “Remove”.
Next, we’ll manually remove leftover program files and folders.
1. On the Start menu, click My Computer (or double-click My Computer on the Desktop).
2. In My Computer, open Local Disk.
3. Open Program Files.
4. Right-click on the QuickTime folder and click Delete from the shortcut menu.
5. Navigate to C:\Windows\system32\.
6. Remove the files QuickTime.qts and QuicktimeVR.qtx. (If “Hide filename extensions for known file types” is enabled on the PC, then those two files will appear as “QuickTime” and QuickTimeVR”.)
7. Restart your computer
Does the repair install go through properly now? Or do you get another error message when you try the repair install?