House Calls Not Necessary
The Web Doctor (that's me) used to make house calls. He would come to your house and work on your computer. For various reasons he no longer offers this service, but he doesn't want to leave you helpless. The following graphic which The Web Doctor used for his house calls can be followed to fix almost all computer problems.
A full-sized copy of this graphic can be seen at http://xkcd.com/627/