To recover deleted files, open the Recycle Bin in Windows, and locate the deleted files. Select the files to recover, right-click on them and select Restore to restore them to their original folders.
If the files are not in the Recycle Bin, try recovering them by using a file recovery software such as Recuva Portable. Avoid writing to the hard drive with the missing files, as this may overwrite the disk space that contains the deleted files. Download Recuva Portable on another computer, and put the program on a USB flash drive. Connect the flash drive to the computer with the missing files, and run Recuva Portable to restore the deleted files. Alternatively, hire a data recovery service to restore the deleted files.