recently i have installed MS Visual Studio 2010 Professional as an upgrade from 2005. I wanted to use the english version but after installation it\'s german(2005 was englis
It's possible.
Install your version (German). Once the installation is finished you can install the English trial version: Microsoft Visual Studio 2010 Professional Trial - Web Installer
Once the trial installation is finished you are able to switch languages in
Tools -> Options... -> Environment -> International Settings
You can even uninstall the german version through appwiz.cpl. Look for Visual Studio components with de or DEU endings.
It seems that the license is language independent.