then i insall visual studio in windows 7 os visual studio run every time error compatibility issue :Please tell me how to solve problem

1. Unfortunately you have placed your question in wrong forum. Here will be better place: http://social.msdn.microsoft.com/Forums/en-US/category/visualstudio 2. You have omitted important information, namely the version of Visual Studio. There are some traces to incompatibility issues, but it is better to focus on particular VS version (example http://support.microsoft.com/kb/960320/en-us ) 3. Always reproduce exact error/warning message. 4. What .NET Framework has you installed before you start install VS? Thank for understanding Regards Milos