Notes about the WTF file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries
, unused processes and other unfavourable system settings to identify slowdown issues.
The WTF file type is primarily associated with 'World of Warcraft' by Blizzard Entertainment. WTF stands for WoW Text File. It is a format used with some World of Warcraft game files.