When i write a small program in notepad with .javaextension and when i try to execute it by giving command javac <filename>.javai am getting warning as ''javac' is not recognized as an internal or external command,operable program or batch file.'
when i try to execute any command, the same warning is shown with the particular prefix of what ever command i try to execute.
Remove the quotes in your PATH variable. They are not necessary there, and by wrapping the entire content in one single pair of quotes probably messes up more than it fixes.
Oh, and your other variables aren't right either. JAVA_HOME should be set to C:\Program Files\Java\jdk1.6.0_25, without the bin folder. The CLASSPATH can be removed as these two folders should definitely not be on it.