Windows Explored

Everyday Windows Desktop Support, Advanced Troubleshooting & Other OS Tidbits

Posts Tagged ‘Networking’

The Case of the Unknown Network Traffic

Posted by William Diaz on February 14, 2011


If you enable “Show icon in the notification area when connected” for your LAN or other network device, a small icon will blink on and off in the system tray, which gives you a simple visual indication of network activity.

One day I noticed that this icon was solid … always. I double-clicked on the icon to see the number of packets passing to and from the Local Area Connection. Read the rest of this entry »

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The Case of the Offline Chat

Posted by William Diaz on February 10, 2011


Among the various types of operations Process Monitor traces, TCP/UDP activity is often overlooked. If you want to examine packets, Process Monitor is not going to do it for you. But it can sometimes present some important clues to a problem and point you in the right direction.

In the case here, our user was not able to get our in-house chat program to go online. You can usually force this by selecting the “List” button, but after several seconds of “Loading…” it would go back to offline. In hopes of finding something revealing, I opened Process Monitor from our lab and set a filter for the executable of the chat program. There were only a dozen operations but the ones that stood out were the last 5 UDP Send operations.
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AIM Network Logging Reveals Windows Passwords

Posted by William Diaz on January 27, 2011


I was asked to troubleshoot a user’s connectivity issues with AIM. I am not too enthusiastic about anything AOL related but I would look anyway. One of the things I wanted to do was see if AIM had some internal network logging built into it. Starting with version 7.5.8.2 there is an option that resides under Settings > Connection that enables diagnostic network logging. Read the rest of this entry »

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The Case of the Zip File That Wouldn’t Open

Posted by William Diaz on December 8, 2010


While trying to extract the SysInternal PSTools.zip, I was running into the following error: “The Compressed (zipped) Folder is invalid or corrupted.”

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Using Application Logs to Troubleshoot a Failed Web Meeting

Posted by William Diaz on August 3, 2010


Here is an example of using application logs for troubleshooting. In the case here, the user was unable to connect to a video meeting hosted across the web in an application called iLinc. After logging into the initial login page, the user was presented with the following prompt requesting further authentication:

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The Case of the Random Internet Explorer Crashes

Posted by William Diaz on July 2, 2010


Some time ago we started to see a rash of complaints where Internet Explorer was crashing while visiting certain sites. Even though we were still largely a mix of IE6 and IE7, I had no problem reproducing the crash with IE8. The error message was rather vague (they often are) and didn’t offer any details as to what was the cause or how to troubleshoot: "IEXPLORE.EXE – Application Error – The Instruction at … referenced memory at … The memory could not be ‘read’":

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