Windows Vista RTM has got an extremly poor application compatibility experience to end users, unlike that on windows 7 evolution causing extremely free apps to break when insalled or run on top of the new operating system.But still windows 7 does fil to play nice with the some few application and programs. This is why now Microsoft peridocially kics up a notice to the platform, updating it in order to resolve various problme reported by customer. For e.g. Feb 2010 Application Compatibility update.