Hello,
I just installed Windows 8.1.
Error:- Patch failed.

Logs:-
[4/9/2015 10:13:19] Launcher was opened. Build Aug 26 2015 23:15:13
[4/9/2015 10:13:19] Operating System: Microsoft Windows 8.1 Professional (build 9600), 64-bit
[4/9/2015 10:13:19] Current Directory: G:\FGUNZ
[4/9/2015 10:13:19] Checking patch servers..
[4/9/2015 10:13:19] Analyzing patch info..
[4/9/2015 10:13:19] Processing files..
[4/9/2015 10:13:22] Needs to update: ./redist/help.txt
[4/9/2015 10:13:22] Preparing file transfers (1 files to update)
[4/9/2015 10:13:22] Downloading ./redist/help.txt
[4/9/2015 10:13:22] File download error: ./redist/help.txt_ (size: 257 // received: 242 // code: 0)
[4/9/2015 10:13:22] Failed download file: ./redist/help.txt
[4/9/2015 10:13:22] Patching has failed.
[4/9/2015 10:13:22] Patching failed (0/1 files updated)
[4/9/2015 10:13:24] Launcher was closed.

I turned off firewall and still having this error. Though i haven't yet installed a anti-virus.