Problems With PSE11 and Windows 7....

Has anyone experienced and resolved the issue of having PSE11 open, then closing and then experiencing a crash when you try to reopen it? I bought the Bundle of Photoshop Elements 11/Premiere Elements 11 for my wife as a early Christmas present Sunday and after several re-installs it does finally work on both Desktop and Laptop. BUT(and I stress BUT), if you close either title it will not open on either system again until you restart your system. Also if you open PSE11 then PRE11 will not open and visa- versa. After a restart it works fine agian but only once. Truly puzzled...... My system requirements are sufficent and my OS is windows 7(64 bit) I have completed the most recent updates with Adobe on both systems. Any help would be greatly appreciated!!!