acces denied on windows 7 ??

Hi all! i'm new in programming Java ... so here is my problem , the teacher told us to make our first program, whitch is creating a ''.java file ''

that i did buit when in the CMD wind I type javac Hello.java... i get an error saying "Error while writting Hello: Hello.class ( access refused)Attachment 763 So since i knew i had no errors in my file . I tried the whole process again but in safe mode ...and everything went fine ...why!!??????

i've posted a print screen for more details on the error ... and FYI i'm an admin on my computer ...and I use windows 7 x64 and java JDK se update 27

thank you ! :cool: