Unless you mean items that are still visible in your recycling bin: just right click on them and select restore... or drag & drop. But I guess that's not what you mean, as life ain't that easy normally!
I assume you mean you have deleted them from the Recycle bin.
Download and run RECUVER.
If you know the drive that the files were on originally, run Recuver for that drive and save to a different drive, if you save to the drive that had the deleted files on- you run the risk of overwriting them.
You will probably find a lot of other deleted files, just select the ones you want.