You can often successfully recover deleted files from a PC, it all depends on what has happened since the files were deleted.
When you delete files the data itself isn't deleted, just the index entry that tells the system where the data for those files is located. The area containing the deleted data is also now marked as free space so it is available for any new files to be written there instead.
If and when that happens, then it is too late to recover your deleted files so it is very, very important to not save any new files or data to the device concerned.
One of the easiest ways to see if you can recover deleted files is to try some good file recovery software like asoftech photo recovery pro, which not only recover photos, but also vidoes, pictures, documents, etc.