zozoka:
Was it deleted with Spybot?
If so, go into Spybot » Recovery and see if there is recovery file to restore it with. However, if it was deleted with Spybot maybe it should not be restored. Maybe the best approach is to find out what is attempting to use the drvkev.dll.
If not, you are going to have to be more specific as to what the file was used with or what deleted it.