I'm working in a completely disconnected environment and so Fiddler Everywhere is not an option for me. I installed the latest version of Fiddler classic and upon startup I get the error "Failed to register fiddler as the system proxy". I read a discussion post that said to try installing v5.0.20182.28034, so I did but I get the same error message. Due to the restrictions of where it is installed, I can't provide any log files, but I would appreciate any help on getting this resolved.
Thanks in advance.
With no logs provided it is hard to guess what might be causing the error message. Still. you could check similar threads for the classic Fiddler here and try to manually reset your proxy settings and start the client a new.