It could also damage - Don't offer advice that could harm the users system, given what essexboy said in the post before your reply:
I can delete that file but, it may make the file locker programme inoperative
Have you set hidden files to show ?
And one even before that:
I can see nothing untoward there WinFLdrv.sys is running but it has not been modified or changed since march
http://www.threatexpert.com/report.aspx?md5=57f65e0f401e295406c1e0daa7836774 gives the details on the files loaded with Folder lock 6 and this is legitimate both in size and location
Is Avast still calling it ?
He is airing in the side of safety, what anyone offering advice on these forums should do, first do no harm and never delete unless 100% certain -
You can't just jump in to offer advice without reading all that has gone on before.
File assassin doesn't help you find a file it does nothing other than delete and in this case is highly likely to damage the users system.
FileASSASSIN is an application that can delete any type of locked files that are on your computer. Whether the files are from a malware infection or just a particular file that will not delete - FileASSASSIN can remove it. The program uses advanced programming techniques to unload modules, close remote handles, and terminate processes to remove the particular locked file. Please use with caution as deleting critical system files may cause system errors.
So in suggesting the tool you are inadvertently advising deletion.