When I try to save or copy a large file to an external hard drive, it begins the process, but about half way through it says invalid file and fails to see the drive at all until I turn off and restart the drive. It almost seems like the copy or write process times itself out - it happens during the write to cd process or copying to external drive. Sometimes it says that it failed in the process, but when the drive is restarted, the file is there. I seem to think another related problem is that when I delete files, it deletes them and then leaves the question "are you sure". If I say yes, its like -files not there. Almost like the computer is blind Has Microsoft recently created an update that may have caused the problem? I do know that my computer keeps asking for a larger usb connection, but the one I have has worked all along until now. Somehow it all feels related -can someone help?