HiI'm running the 90 day trial of the Enterprise version of Windows 7. So far I've updated the graphics and sound card drivers, run Windows Update and downloaded a couple of updates and installed Flash player.I just tried to install iTunes, and after installing as normal, a dialog pops up at the end with the aforementioned error message, and it also says thatinstallation could not be completed. I've had the same thing happen with a game demo too.I've dug about online a bit, and two possible fixes are:- Make sure you're an Administrator- Download, install and use the Windows Installer Clean Up program: http://support.microsoft.com/default.aspx/kb/290301I've made sure I'm an Administrator and I've used the Clean Up program to clear installations that were not resolved.Any other suggestions? I'd like to regain the ability to install apps very much - other than this Windows 7 is running very nicely and I can't wait to start doing some coding, once I'm sure all is stable and well.My specs: 80GB Hard Drive, 2.4GHz Pentium 4, 1 GB RAM.

Hi, Put the program installer on your desktop screen then right click - properties - compatibility Tab - tick Run this program in compatibility mode for. Choose the OS that you had these programs running in with no problems before. Click apply. Start Set up. Slan gofoill, Paul

Hi, First, make sure the latest version of the software is available. You can download iTunes from the following link: http://www.apple.com/itunes/download/ To install it, please perform the following steps: Install program under compatibility mode & Administrator level ================= 1. Right click on the installation file (setup.exe) of iTunes and click Properties. 2. Click on the Compatibility tab. 3. Select Run this program in compatibility mode for. 4. Choose Windows Vista (Service Pack 2) from the drop down list. 5. Select Run this program as an administrator option under the Privilege Level topic. 6. Click Apply, click OK. Right click on the setup file and choose Run as administrator to install it again. You can also try enabling admin account:Enable built-in admin account==============1. Click Start, click "All Programs", please find and open "Accessories" folder.2. Please right-click on "Command Prompt" item and select "Run as administrator".3. Please type the following command line in to the coming window. net user administrator /active:yes Note: There is a space between "Administrator" and "/active:yes". 4. Log off and log on the Administrator account.If it still does not work, you can test it in Clean Boot mode. Hope it helps.Vivian Xing - MSFT