I can connect to your computer via remote access.  This means you don’t need me at your house to fix a problem.  You can see everything I’m doing on your screen at all times and you can disconnect any time you want.  I will need your permission each time I access your computer so don’t worry about me having access to it at any other time.  This allows me to do just about anything that I can do while sitting in front of your computer (short of opening the case or inserting a disc).  This service also saves you money as it’s less expensive than me having to drive to your house.  All you need is a working internet connection and you’re all set!