"Making a 'business' installing LL on old computers": your comments please ...

[Moltke]

So is there something I need to change in the advert to provoke more interest? 
Your comments/criticisms are welcomed or alternative approaches to marketing, etc.

What about getting your ad directly to people? You might want to consider printing it and handing it over to people on the street whenever and wherever possible, post it somewhere; on a wall, on an electric pole...Don't know,  where possible and permissible. This way you'll increase your chances since you'll be getting to more people, don't forget to add a link to your web-ad.

Hope this helps!