You cannot physically delete files using shift>del or by first deleting the file first to recycle bin and then deleting it from the recycle bin.
The file is not actually physically deleted. It is only virtually deleted.
However a file can be restored if the file is accidentally deleted by using recovery softwares.
Tune up undelete is one good software which can be used to undelete files which have been accidentally deleted from the reycle bin or files which were shift > del deleted.
There are also other freewares available .
You can also perform a system restore to the point before which the file has been deleted. But if there are no restore points you will have to use one of the third party softwares.
Just google for it and you will be able to get a lot of them.