.net deployment issues

so..every computer that runs a vb .net application has to have the .net framework installed already, right? does anyone have any info as to what percentage of computers out there already have this installed. I created this application in vb .net that works fine but am worried that the majority of my customers do not have the .net framework installed...how is everyone dealing with this issue? or is it an issue at all?

It is an issue, but everyone will need the framework eventually anyway. It's a 25MB download for customers, but they only have to do it once.

I just mail my customers a disk with it on for the first time, then they download any updates for my app from the web. ;)

**EDIT** As an alternative, there is a bootstrapper plugin that allows you to distribute your app with the framework. But it'll make every distribution 25MB larger, which is no good if your customers are downloading it.

The .NET Framework is worth the hastle in my opinion. :D