My co-founder and I make Ninite (YC W08) <a href="http://ninite.com" rel="nofollow">http://ninite.com</a><p>It automatically installs apps for windows fast.  It's free for home use, but we charge businesses.  Many of our subscribers are PC shops like yours.<p>It's fascinating to see the next step up the value chain in such detail.  Thanks for writing that post.