Unable to install Itunes 10.6.3 on windows 7 (64 bit)

Hey everyone

I recently had itunes version 10...... installed on my laptop and had no issues with it. However a couple of days ago I wanted to sync my iphone 4s to my laptop and nothing was happening. So i tried to start the Apple Mobile Device Support manually within the 'Services' program and nothing happened. So I carried out the following tasks:

- Uninstalled Itunes and all Apple software e.g. Quick time, Bonjour etc

- Ensured all apple folders was deleted from the C:

- Downloaded the itunes.exe from the apple website.

- rebooted laptop

- Proceeded to installed Itunes 10.6.3

This is where my issue begins! When it reaches about 95% of the installation the status is showing as 'Starting Services' and then after a minute the below error message appears:

'You have insufficient Privilages' and I have 3 options: Retry, Abort or Ignore

If i click on Retry the same message appears, if I click on Ignore the installation completes, Itunes works fine. However when i connect my iphone to my laptop it states that a software is not installed. Please reinstall Itunes again.

Having done a bit a research the 'missing' software is the Apple Mobile Device Support. Therefore I extracted the itunes64.exe so I can install the AMDS via itself. However when I do it it will get as far as near the end and then decide to roll back stating that it encountered a error and therefore its not installed.

I have tried all the following:

- ensure that my account has admin rights

- disabled my anti virus (which is AVG). I even uninstalled it just to be sure

- tried to install a older version of itunes - it installs fine, but when i got to launch itunes the following error message appear - Itunes.dll is created by a newer version. Then nothing happens

- I have ran disk checks and other various checks and all came back fine or fixed.

i have been on this for about 2 days now and have no idea what to do next, PLEASE HELP ME!!!