If you have Windows 7 this should be effortless if not make a comment. For now I will assume you have Windows 7. Click your Start Menu button and then right above that there should be a little text...
Go to the following link and enter your Dell Service Tag
http://support.dell.com/support/topics/global.aspx/support/my_systems_info/en/details?servicetag=
You will see the Dell Model under System...
Lots of places! What's your laptop model? It's usually printed either on the front of the laptop above the keyboard, and always underneath it. If you're in doubt, the service tag number (which should...