When you find out the shadow copies of the deleted files were never created by your Windows OS, and Windows backups weren't set up properly, download Disk Drill to restore your deleted files and give it a try. You can even restore files when deleted from the Recycle Bin, as Windows works that way: deleted files are not physically removed, but just marked as deleted. You may not see them in Windows Explorer, but they may still be present on your hard drive. Until these deleted files are overwritten by other data, you have a good chance to recover them. With powerful Quick and Deep Scans, Lost Partition Search, Catalog Rebuild and other file recovery algorithms, you are in very good hands and have all the chances to get your data back within minutes and completely free (up to 500MB).
Disk Drill is a great app that can restore deleted pictures, and sometimes even those pictures you could not preview in the app. But it's even better when you start using its Recovery Vault data protection and restoration mechanism. It works transparently and invisibly at the same time: Disk Drill runs in the background, tracks your deleted data, marks it in a specific way, and in case you need to recover it in the future, Disk Drill has you covered.
If your deleted files were pushed out of the file tables stack, Quick Scan won't pick them up. This is when Disk Drill enables the extra power, Deep Scan. This file signature based algorithm is capable of reconstructing deleted files according to their digital structure. It's amazing how many lost file formats get back to life thanks to Disk Drill and its Deep Scan. Disk Drill features more than 200 file formats in the database, new ones are added with every new update, and the software is completely open to any custom formats you may need recovered.