** On another computer, quickly formulate a portable version of a backup/restore utility onto either a dvd or usb, boot and use that portable restore utility to search for, find, recover that lost file. The more you use Windows, the more writes and writes it makes and you could lose that important file if any part of it is overwritten. **
Going forward, please consider using a quality 3rd party backup/restore utility such as Acronis True Image, Macrium Reflect, Image for Windows, just naming three of the many available free and pay-for on The 'Net. Windows File History/Backup combine can be problematic.
"Take care of thy backups and thy restores shall take care of thee." -- Ben Franklin revisited.
Backup, backup, backup! -- Lady Fitzgerald (w7forums)
Clone or Image often! Backup... -- RockE (WSL)
"I heard Spock finally got colander!" "I believe the word is Kolinahr." "Oh."