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When I try starting Fiddler2 on my “windows 7 enterprise” box, I get this error message in a dialog box. What could be wrong ? I’ve tried uninstalling and reinstalling. I’ve probably restarted windows several times but even that doesn’t seem to make a difference. Do I need to delete any files that might have been created during a previous aborted session ?
TITLE : fiddler startup aborted
message : fiddler appears to be running in this user account. Maybe in a terminal services session ?
This indicates that Fiddler’s mutex cannot be created– no lingering files or settings would cause this. If it repros after a reboot, then there’s a problem elsewhere. Version 2.3.4.6 (https://www.fiddler2.com/dl/fiddler2alphasetup.exe) this blocking error is changed to a prompt.