Since you only lost the file this morning, you have a decent chance of getting it back. Just make sure you don't save or download any new files until you've recovered the lost file. There are several options available to you depending on how your computer is set up (even if you don't have a system restore point):
Check OneDrive files – If you use OneDrive on your PC, your file may have a backup copy on the server. It also has a feature called "Restore your OneDrive", which allows you to undo any changes made to your OneDrive in the last 30 days. Log in to the OneDrive website, then click the gear icon at the top of the page > Options.
Restore Windows backups – Aside from System Restore, you can also check File History (Control Panel > System and Security) and Backup and Restore (Windows 7) (Control Panel > System and Security). Despite its name, the latter tool works on Windows 11 (and 10) just fine.
Use data recovery software – Data recovery software is a type of software tool that can restore lost files from a computer or storage device. For beginners, I recommend <removed> or Recuva. If you're willing to brave a small learning curve, try PhotoRec or Windows File Recovery.
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Warning! If you delete files from your system drive and you don't have a cloud or local backup, you need to shut down your computer right away. Then, scan your system drive by connecting it to another computer or booting from an external drive to look for deleted files.