It's not your exact symptoms but it may help.
I am having trouble trying to delete files with my mouse or with the delete key. My right click will not work...once I right click on a file or even my start button, everything closes. If I hightlight on a file and hit the delete key, everything closes. I have to drag any file to the trash can, but I can not use the "empty trash can" command either. I have to highlight any files in the trash can and click delete.
Also if I highligt a file and hit the delete key...everything closes. How can I get these functions back?