Category Archives: Fiddler

Case of ConfigMgr Setup Updates Failing–Error 0x80072efe

ConfigMgr setup successfully downloaded several thousand files during pre-requisite downloads, then failed with error: An error has occurred while attempting to download or verify required prerequisite components and Setup cannot continue. Review the configmgrsetup.log file for further details. Opening C:\configmgrsetup.log … Continue reading

Posted in API Monitor, ConfigMgr, Fiddler, WireShark | Tagged | Leave a comment

Case of the Lenovo Driver Download Fail–500 Internal Server Error

Needed to update the graphics driver on a Lenovo Carbon X1, quick google found the driver easy: Click the link… The page failed to load in any browser. Searching from pcsupport.lenovo.com home page also failed…   Checking with Fiddler I … Continue reading

Posted in Fiddler, Windows 7 | Tagged | Leave a comment

Debugging / Viewing Windows Update Log on Windows 10 Insider Builds

Having confirmed with WinDbg team currently insider builds don’t get public symbols unless it is a major release (They are looking into a solution….) How are we going to debug anything on bleeding edge systems “Fast Track Updates” in the … Continue reading

Posted in Fiddler, ProcMon, WinDbg, Windows 10 | Tagged | 5 Comments

Patching a PAC File To Improve Performance

Having taken the trouble to write a PAC file debugger ( https://chentiangemalc.wordpress.com/2013/09/30/pacdbg-custom-proxy-browser-set-proxy-cmd-line-tool/ ) I have to say I’ve seen some pretty horrendous PAC files, where attempts have been made to put the entire network design in this little JavaScript file. … Continue reading

Posted in Fiddler, Internet Explorer | Tagged | 5 Comments

Case of the System.Net.WebClient (407) Proxy Authentication Required

When attempting to launch DebugDiag Analysis Engine ( http://www.microsoft.com/en-us/download/details.aspx?id=42933 ) I received the error message Error Running TaskOne or more errors occurred. System.Net.WebException: The remote server returned an error: (407) Proxy Authentication Required.    at System.Net.WebClient.OpenRead(Uri address)    at DebugDiag.Analysis.AutoUpdate.GetWebContent(String … Continue reading

Posted in .NET, Fiddler, WinDbg | Tagged | Leave a comment

Case of the Office XP Web Component ActiveX

There was a website used for reporting, but when users went onto Windows 7 for some users the reports did not show up, only on some user machines. For this type of issues I typically like to get two logs: … Continue reading

Posted in Fiddler, Internet Explorer, ProcMon | Tagged | Leave a comment

Case of the Office 365 “Something Went Wrong”

Intermittently in SharePoint Online the Office 365 toolbar would just not appear. In other cases it would appear but Outlook Web Access would get stuck at logon and eventually fail with message “something went wrong”  This problem only occurred to … Continue reading

Posted in Fiddler, Internet Explorer | Leave a comment