What versions of Windows are currently the most popular

Question

Does anyone have a ballpark percentage breakdown of Windows versions currently being used out there?

For example, 60% are using Vista, 30% XP etc etc.

We are currently building an installer and we need to know what will give us the most coverage. What we are particularly interested in is the prevalance of .NET versions as our application has a dependency on .NET 3.5 SP1.

Answer 1

Take a look at w3schools browser stats.

Edit:

Since a lot of people seemed interested in this, I plotted the stats as a graph:

alt text http://lanfear.c0la.se/~emil/osmarketshare.jpg

Answer 2

Here are some stats for my site

XP                  71.81%
Vista               21.67%
Server 2003         5.28%    
NT                  0.97%
2000                0.28%

Answer 3

I don't know exact numbers, but I am pretty sure XP is the most used one.

This wikipedia articles gives some numbers and claims Windows XP to be 63.53% market share.

http://en.wikipedia.org/wiki/Comparison_of_Windows_versions

Answer 4

XP is definitely the most used, since Vista came out with several problems people don't like, but soon Windows 7 will be out which is a refined version of Vista. So that could make a dramatic change.

Windows market share goes in detail of some numbers you can look at.

Answer 5

Valve releases their survey statistics. Helps with operating system versions, but not your .NET 3.5 issue.

http://store.steampowered.com/hwsurvey

Answer 6

My own experience , I have changed 3 job in 2 years working for 1000+ people company. They all use XP. Never heard anything about upgrading to Vista plan.