Recently we worked with on customer, who tried to install KB934016 on Windows 2003 server, however the Update.exe interestingly just crashed and failed to launch. We went through below plan one by one till find the root cause and fix it. Share the...

Recently I got a service call regarding below SqlException in event log: Event Type: Warning Event Source: ASP.NET 2.0.50727.0 Event Category: Web Event Event ID: 1309 Description: .. Event code: 3005 Event message: An unhandled...

Microsoft is bringing Windows Azure Web Sites, Virtual Machines, Service Management Portal and API to Windows Server, enabling service providers to easily deliver high-density website hosting and Infrastructure as a Service scenarios in a Windows Server...

Microsoft is bringing Windows Azure Web Sites, Virtual Machines, Service Management Portal and API to Windows Server, enabling service providers to easily deliver high-density website hosting and Infrastructure as a Service scenarios in a Windows Server...

The user reported that he failed to access the web site with HTTPS protocol with “Page cannot be displayed” error message. At first we could not find any abnormal clues from the output of “certutil -veritystore” and “netsh...

When you want to explicit disable Proxy Server on Internet Explorer’s connection setting from IEAK, you may find the setting doesn’t apply: client still keep old exiting setting, i.e. checked. If check from Group Policy Management Editor...

We got couple of severe IE performance issues recently. After spend lots of time, we suspect these issues are due to poor quirks mode. We want to change the IE documentation mode to verify this. However, for these scenarios, IE hang/dead with 100% CPU...

You may implement a state machine workflow and deploy it to a production server. Intermittently you may f ind that the workflow does not work as expected. If you enable workflow logging following the instructions in KB972914 , you will see System.Workflow...

A customer enabled workflow logging following the instructions in KB972914 . He asked what “ManualWorkflowSchedulerService: CanRun is False” meant in WF logging. And is it normal? As you know, if we use ManualWorkflowSchedulerService...

We often got customer service requests about Proxy Setting not applying via GPO. Usually customer might deploy LAN setting through GPO IEM. I summarized several symptoms and solutions from my support experience in case you might get similar issue: ...

A customer reported that IUSR_<COMPUTERNAME> account was locked out on his Windows 2003 server. IIS anonymous authentication was disabled on this server. It is easy to identify this issue by enabling “Audit account logon events”...

Recently had this issue with a customer where their IIS 7.5 server was serving content just fine, however they had a requirement to implement failed request tracing. After setting up the failed request tracing rule and enabling it at the site level they...

If IIS 6.0 related classes are missing from the WMI repository and you do not want to re-install IIS, you can try the following steps: 1. Open a command prompt and change to %windir%\system32\inetsrv. Run the following command: for /f %s in ('dir...

I got two cases with different products: 1. ASP.NET 2.0 application stops responding intermittently. 2. WF 4.0 workflow service reported the following exception: Exception: System.Runtime.CallbackException Message: Async Callback...

I was questioned regarding Lync 2010, why does it always open the chat window hyperlinks in the same IE tab. The IE tabs settings doesn’t seem to take effect. No matter whether you set it to “A new window”, “A new tab in the current...

Background: 1. Suppose we have a WCF service which is using session-full binding like Net.tcp. We are using the default setting of timeout of net.tcp bindng . For example: a) OpenTimeout -> 1 minute b) CloseTimeout -> 1 minute c) SendTimeOut...

The child workflow is composed from some existing activities. This child workflow is treated as an activity in the master workflow. Sometimes we may need to track the internal activity execution information of the child workflow. However even if ActivityStateQuery...

Case background: Recently, we have a case that asp.net will consume the backend web service. We found the bottleneck was caused by the maxconnection to the remote web service. We changed the maxconnection setting like below by following the KB821268...

Recently I worked on a problem where there was an issue with MIME type application/json from being compressed in as expected in IIS 7.5. After checking the starting steps like are the proper roles installed on the web server, then went about collecting...

Case 1 An Intranet portal website is set as IE’s home page. When users are connected to an external network and launch IE, some ISPs might distort the requests and redirect the Intranet website to their own advertise/search websites. Due to...

My customer has an application runs fine until upgraded to WCF 4.0. After that, he received follow message intermittently. 0xc00e0051 means MQ_ERROR_TRANSACTION_SEQUENCE. <Message> An error occurred while receiving a message from the queue...

Actually blank page can be caused by many reasons. I will post more cases about blank web page troubleshooting for your interesting later. Today let me share one I worked on at the end of last year. I think it is a good example about how to use...

Microsoft SharePoint providers a feature allows you to “Sign in as another user”. I got two escalations regarding the “Sign in as Different user” feature recently. The customer’s design of this feature is pretty...

Background: Here suppose we have two machines: one is the web server, and another one which simulates a client to send out HTTP requests. And the web server name is renhe2. Normally speaking, the steps to have a load test with WCAT can be summarized...

Failed Request Tracing is very helpful and easy way to troubleshooting errors, slow requests and unexpected IIS response. Sometimes I received too many tracing files. I hate to open them one by one to find out the trace file I am interesting and...