Thanks for posting your question here! Yes, you can use the inbuilt VGA port on your laptop to connect one external monitor and connect a second external monitor through the Plugable UGA-2k-A and extend both displays on Windows 7 (except for Windows 7 Starter).
Here is a link to another post which explains how to do this-:
Dual Monitor Setup on Windows 7.
Windows 7 Starter does not have multi-monitor support. Here is a link that lists the limitations of Starter edition-: Windows 7 Starter Limitations.
Hope the above information helps! If you need any additional information, please do feel free to post back here or shoot us an email at email@example.com. We are here to help!