Green ribbon of death?
I understand you to say that your webpages are taking to long to load. The ribbon is a way to show you when the request "you've made" is being accessed. And this happens with all machines in your office. Do I understand correctly?
I'm far from expert here so......................
Do all machines connect to the same server?
Does that server connect to a router>modem or is it being used as a router?
I would be surprised if Dell screwed the pooch the same way on every machine, that would be a systemic issue at Dell and there would be alot of unhappy customers.
Look at whats common to your network.
Is the networks modem set up right?
Is the networks router set up right?
Are the nic's, in individule computers, set right for your network, drivers
Is your networks ISP service bandwidth enough and are you getting what you paid for?