I think I've found a bug with RapidCRC. RapidCRC appears to have an issue with hard links in NTFS on Windows 7. RapidCRC appears to be creating a value from the hardlink itself, not following the link to the "real" file. An example of this is calc.exe found in c:\windows\system32. I've included a line of powershell to get this information. get-childitem c:\windows\system32\calc.exe | format-list fullname, target FullName : C:\windows\system32\calc.exe Target : {C:\Windows\winsxs\amd64_microsoft-windows-calc_31bf3856ad364e35_6.1.7600.16385_none_05b2f2e2346cfea4\calc.exe}...