Q: I double click on the iTunes icon on my desktop. Nothing opens. I've tried reinstalling it several times no luck. Suggetions.

Have you had a look here   http://www.apple.com/support/itunes/troubleshooting/

Try following steps one at a time:

1. Restart computer, right mouse click iTunes icon and select "Run As Administrator"

2. If that does not work, check to see if this file APSDaemon.exe is the problem here.

Close your iTunes.

Press Ctrl-Alt-Del key and choose Task Manager. In the "Processes" Tab, select the file APSDaemon.exe and click End Prosses button, then close the task manager window.

Now open itunes and see if it is working?

If that works, to prevent having to do the same process everytime you restart Windows, go to. START button, type in

MSCONFIG

Hit ENTER

Click STARTUP Tab, Uncheck "Apple Push", click OK.

Restart Windows.

3. If that fails or you don't see ApsDaemon.exe in the Processes, refer to following article to remove SC files:

http://support.apple.com/kb/TS2363

4. If that fails, repair or reinstall your Quicktime. START / CONTROL PANEL / PROGRAMS N FEATURES / hightlight QUICKTIME and click REPAIR.

I have done everything you have suggested & itunes will still not open on my pc.  Any other suggestions?

Right mouse click your itunes icon, select Properties, then Compatability tab. Check the box "Run this program in compatibilty mode and choose Vista (SP2) & also to check the box "Run as administrator" then OK.

I am running on XP & did not have Vista as an option.  Also, when I enter Administrator it is asking for a password.  I am not aware of a password being setup.

I also have tried to open itunes in safe mode, no luck.

If opening iTunes in Safe Mode still have the same problem, follow the article to create another User profile:

iTunes for Windows XP: Troubleshooting unexpected quits, freezes, or launch issues

http://support.apple.com/kb/TS1421

If you face the same issue after above, follow USER SPECIFIC TROUBLESHOOTING.