Can't start Fiddler.exe "Requested service is in use"

[n/a]

I've just started using Fiddler to try to diagnose some data packets sent to a website.
However, every time I try to start Fiddler.exe, I get an error "The requested resource is in use". I don't know which resources Fiddler.exe uses so I have no clue how to resolve this. In addition, this seems to be a unique error, as my searches have turned up no similar occurrences in the past.

[Alexander]

Hello,

This is really strange indeed. Would it be possible that you send us a screenshot of the error window? Also does this happen when trying to start other programs installed on your computer?

Regards,
Alexander
Progress Telerik

[n/a]

Here's a link to a screenshot I captured: https://imgur.com/a/elInl

I've honestly never experienced this error before with any programs I've used in the past, so I can't say the same error triggers when using other programs.

[Alexander]

Hello,

This does not seem to be a Fiddler-related problem. A quick search for "requested resource is in use" result in many blog posts and articles how to fix it and the images in those articles show the exact same window you sent us (with of course different path of the application).

Regards,
Alexander
Progress Telerik