Can’t Recover Deleted Folder & Files

A folder of files was somehow deleted from my documents directory. I searched to no avail. I downloaded Recuva and tried it several times with the same result, it scans for several hours, then before completing its search it restarts and I have been unable to find the missing documents. I have a Dell Inspiron with windows 10. Please let me know you have any suggestions to recover my deleted files. I tried to delete programs to make more space on my hard drive but no luck. Thank you.