CMD commands not recognized (Fixed!)

Today i had problems with Java and not being able to open or run .Jar files, After a little research i changed the PATH file in environmental variable, Java 32 bit was called CLASSPATH and i had some nvidia file as a variable PATH and i replaced it with java 64 bit. It did fix the problem i was having but then later on if i entered any command into CMD it would say "Is not recognized as an internal or external command, Operable program or batchfile" And i carnt work out why. 

I fear that ive probably broken something. Any help would be great.

Make sure the PATH contains the following:


Or at least the first two, pointing to the system32 folder and the Windows folder.

yep,you erased the path to all your CMD programs, aka commands.

Ah, thank so much! Everything seems fine now