Freezing of computer while launching IntelliJ Idea 11.1

Hi,
I am using IntelliJ Idea 11.1 and everytime while launching, it causes the computer to freeze. What happens is when you double click on the idea, the mouse pointer freezes and becomes unresponsive and none of the shortcut keys work either.
The only way to solve it is to physically restart the PC.

I am using XP Pro and have a personal license for the program. Do you know what could be happening and how I can stop it?
Thanks.
