Hard disk space problem

thanks for co-operate with me,

But I have try this one also but there are not my problem is solved.

Thanks,
Jitendra

you maybe has big pagefile, or hibernate file.. or you havent empty your recycle bin.. if none of that than maybe something is wrong with your hdd.. bad sectors or something like that.. 
you should show hidden files and folder, and show system files and folders so you can check pageFile and hibernet file...
so in windows explorer from menu tools -> folder options, tab-view, select show hidden files and foders, and UNCheck hide protected operating system files(recomended)
and you will see many new files.. don't delete any of them, unless you know what are you doing..  because your system may not boot..


this is some basic stuf.. so if you have some experience, hothing i said is not important... but if you don't (DON'T DELETE THE FILES THAT APAIR when you select that options)

sorry for my english