When turning on my computer this morning it gave me this message, reboot and select proper boot device or insert boot media in selected boot and press any key. What does this mean, did I lose everything? HELP ME PLEASE.
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It means it can't find the operating system. If you did not change anything the last time you used your PC - no updates or anything, you may have a hard drive failing? You may be able to cold boot a few times and get it to work or not depending on what the cause of the error message is. You can also boot from the O/S disk and try a "recovery" of the O/S.