First make sure that you have added the specified file for scanning, as shown in the attached image.
If you immediately wish to scan for this file, perform a "Full Rescan" of  the computers you need.
Use the following SQL code for your report:
Select Top 1000000 tblComputers.Computername, tblComputers.ComputerUnique,   tblComputers.Domain, tblADusers.Username, tblADusers.Displayname,   tblFileVersions.FilePathfull As  [Attempted To Scan], tblFileVersions.Found,   tblFileVersions.FileVersion, tblFileVersions.Filesize,   tblFileVersions.CompanyName From tblComputers Inner Join   tblFileVersions On  tblComputers.Computername = tblFileVersions.Computername   Left Join   tblADusers On tblADusers.Username = tblComputers.Username And     tblADusers.Userdomain =  tblComputers.Userdomain Where tblFileVersions.FilePathfull = 'C:\Windows\System32\DriveLock.exe' And   tblFileVersions.Found = 0 Order By tblComputers.Computername