Howtos / Articles

Signature Images Missing in Outlook 2013

If you have recently installed or upgraded to Outlook 2013, and use html based signatures with images, you may have found that when you send an email using the signature, the recipient doesn’t get the images on their end. They just appear as a little red cross. Previous versions of Outlook would embed the images in the email, and the recipient would see them fine. In Outlook 2013 however, it now defaults to not embedding the signature images for some…

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Disabling TCP Auto Tuning

If you have a application that uses TCP network communication and it seems to be running slow, you may find that it is because of a feature in Windows called TCP auto tuning. TCP tuning can be used to speed up network communications, but it can also greatly effect performance if not done correctly. By default, the TCP auto tuning feature is enabled in Windows, and in most cases this will work fine, but there may be times where this…

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Windows Virtual Store Location

Since Windows Vista was released, Windows has had a security feature called the Virtual Store. Some legacy applications will try and read/write configuration files in a location that would require administrative privledges (eg. C:\program files\<application>). The Virtual Store is used to allow these applications to continue to be able to read/write files in this location (virtually), but they get stored in the Virtual Store. They just appear to virtually be under their original location. This happens transparently to the application.…

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View listening UDP ports on Windows

This guide shows you how to view a list of all the listening UDP ports on a Windows machine. This is useful for knowing if a service is listening on a specific port. View all listening UDP ports on Windows: Open the command prompt. Run the following command: netstat -an | find “UDP” | more Example output: UDP 0.0.0.0:1234 *:* UDP 0.0.0.0:1235 *:* UDP 0.0.0.0:1236 *:* UDP 0.0.0.0:1237 *:* UDP 0.0.0.0:1238 *:* UDP 0.0.0.0:1239 *:*…

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View listening TCP ports on Windows

This guide shows you how to view a list of all the listening TCP ports on a Windows machine. This is useful for knowing if a service is listening on a specific port, or if you need to know if a specific port is available to use for something like a web server. View all listening TCP ports on Windows: Open the command prompt. Run the following command: netstat -an | find “LISTENING” | more Example output: TCP 0.0.0.0:80 0.0.0.0:0…

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