Check this topic out http://answers.microsoft.com/en-us/windows/forum/windows_8-files/ctrl-z-in-explorer-didnt-undo-it-deleted-and-i/b664e96a-5ebf-4964-9474-51e565f29d10, the recovery software i found that was quite good was photorec
Yeah that happens on my pc too check out this page, Windows 8 does this by default its normal behaviour http://social.technet.microsoft.com/Forums/windows/en-US/6e4ca5ef-c483-499c-b68f-856fb68d8867/monitors-turn-off-after-being-locked-for-one-minute?forum=w8itprogeneral