Hmm. That is a bad practice to have an image link like that. That may very well be where the image resides on your machine but it really needs to be placed in the folder where your website resides because, if you were to purchase hosting from someone, that is not where the image will reside at all.
consider this directory structure
If your image control resides on YourPage.aspx the ImageURL could be any of the following:
Images/coseke logo.jpeg <--This would only work if you were actually working in a domain and not off of localhost
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