Category Archives: Fiddler

Case of the OneDrive for Business “Sorry can’t add your folder right now”

Setting up OneDrive for Business successfully completed sign-in and two factor authentication, but failed on final step with error: Sorry, OneDrive can’t add your folder right now Please contact support. Taking a trace with Fiddler showed a HTTP 501 error … Continue reading

Posted in Fiddler, Office, Troubleshooting | Tagged | Leave a comment

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 | 6 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