Before anybody jumps on my case I've already had a little search and still cant find anything helpful.
So I've already tried allowing fgunz through my firewall in various ways, the program, the folder, creating a folder and allowing it though firewall to then install fgunz into, still didnt work.

17:02:15:205 [ZUpdate] Move patch files.
17:02:15:210 [ZUpdate] ERROR : Invalid CRC '.\PATCH\Gunz.exe_'
17:02:15:255 [ZUpdate] This file is must restart : '.\PATCH\Launcher.exe_'
17:02:15:259 [ZUpdate] Move patch files successfully complete.
17:02:15:263 [ZUpdate] ERROR : Cannot move patch files.
17:02:15:267 [APP] ERROR - Update fail
17:02:15:272 [APP] Updater error message :

Invalid CRC from the downloaded patch file. : .\PATCH\Gunz.exe_
[Tip] Please check your anti-virus program and firewall running on your system.

These are the only error messages i seem to be stick on, to me it may as well be a different language, just kinda hoping somebody can shine some light. My anti virus is "Trend Micro Maximum". If anybody has experienced the same error and resolved it I would love to hear how.