Can't close crashed windows

I'm getting crashes whenever I attempt to download large files or do large ftp transfers. This has happened with Windows Live Mail, Firefox, FireFTP (within Firefox), and Filezilla.

The real problem is that once the application crashes, I cannot close the window, or force the application to end, even with the task manager. It remains open, unusable, and the program can't be restarted, until I restart the computer-- and even that requires a few attempts.

Any ideas?

Same issue here my friend.

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