Assumptions abound…be careful not to fall prey.  When troubleshooting, be methodical.  If the web browser is not displaying the homepage and shows a connection error: Is the problem the web browser, an infection, the network cable, the DSL router, the power source, the Internet service provider or the user?  Could it be a combination of these?  What to do?

Whatever the case, stay calm, use common sense, be methodical, return to the basics and/or seek assistance.  More often than not, the solution is simple.