I wouldn't restrict it to "Home Computer Assistance". Lots of people, especially these days, are doing home office or small business work from their home, or from a hole in the wall shop. You want to be sure you get their attention, too.

I don't know if the "let me help" line is good. You want to give an impression of confidence and stability - many people have their lives tied up in these machines and are scared to have others work on them. (I don't know what would be better, though.)

Emphasize your differences from Geek Squad and the like. They have a big company behind them, but you have personal service and decades of real experience. You can be a real person while they're a faceless monolith. :-)

If you have Mac and Linux experience, list it. Both are becoming more popular, with lots of new users who need some hand holding.

Spybot Search and Destroy, Adblock Plus are essentials for Windows, IMO. You probably also want a registry cleaner. I don't know of any free ones that aren't ad-ware or the like. PCTool's Registry Mechanic has always worked well for me - I think there's a trial version.

You've got a lot of useful experience and I'm sure you'll be very busy soon! Good luck!

Cheers,
Scott.