Ask yourself what could people be typing in in other parts of the country to find my products or services. Make a list. Your banner ad is shown throught the entire search engine irregardless of what the public might be looking for. Targeted banner ads are linked to certain search terms, if available, so that your banner is shown only when certain words are typed in. Sometimes the firewall people at companies try to keep out undesirable email by inadvertently setting their equipment to deny email relaying.
Any computer being sold as new is more than up to the job of surfing the web.
All PC and MAC based computers come with enough software built into their operating systems to at least be able to access the web. Basic Web software includes dial-up connectivity, web browser and email program. A local area network puts all the files of any machine at the disposal of any other. Access to any and all disks is configurable. Printer sharing and modem sharing allow you to take advantage of centralized printers and singular modem resources throughout your office environment.