IE 9 is not showing in Program list

My Dell PC comes with Core i5 processor, 2 GB DDR3 RAM and Seagate HDD. I have upgraded the Internet Explorer 8 which has come with the PC to Internet Explorer 9.
When I am left-clicking on the ‘Windows’ button, the Internet Explorer displays in the abbreviated application list. But when I click on ‘All Programs’, it is not showing there. The Java is also getting a series of crashing and I don’t know why this is happening. Please help me to get out of this problem.
Thanks.
