What computer operating system?
There have been no within version updates for 11 as there have been for 12/12.1 and 13/13.1. The only within version update could possibilty be in the Camera Raw plug-in (after a time Camera Raw offered no more plug-ins, I believe it stopped for 11 at 7.4. See Premiere Elements 11 Expert workspace Help Menu/Updates to get your status on that.
As for the rest, that seems to me to be a computer matter...
a. Latest version of QuickTime 7 installed QuickTime - Download - Apple
b. Windows or Apple Updates
c. Computer optimization
Did the purchase comes as a download from authorized reseller or an unopened box packaging of the product?
Please consider and supply details for us to help you.