You can easily implement an internet answering machine. Although similar to Phone Answering Computer Software, it's a service you subscribe to. You get a 30 day free trial as well. Essentially you get your calls online and it's an easy download to implement.

Some of the features of having phone answering via computer software are:

• Take a message
  Take the call
  Make free calls
  Send text messages
  Telemarketer Blocking
  Your Contact List
  Message Alerting and Delivery
  Private Screening of Number
  Greeting to Caller
  Phone number and Fax number

To acquire more information about whether this service meets your requirement for phone answering computer software, you can click on "Email Faxing and Internet Answering Machine" when on this page.