A much cleaner and better option of solving this error than Offline download is to set Up Proxy server settings in Eclipse and then download the Android components.

You do have options to set proxy server in 'SDK manager' but that does not allow you to set user name and password if your proxy server requires you to. Hence, that does not work. [More]

Want to install android SDK components offline? But why? Well, there could be number of reasons like your machine is behind a firewall and hence is blocked from online installations or you don't have an active internet connection. The reason could be any but the answer is that you can download SDK components offline and install them on your own. Here is how you can do it. [More]

This article is aimed at helping you with the first time installation of NopCommerce on your local machine (not web host).
NopCommerce is an open source eCommerce solution written in asp.net and is available for free download and use. [More]