Hello!
I am using window vista OS with 20GB HDD space in C/: drive.I am requiring a littie more space their.Please tell me how can it be done.

Hi Anand, you con make more space by cutting down the disc space system restor uses,,,, i think its about 15%,,, on my system i set it to half of what the default was,,, try his link and good luck,,,,, figgis
http://lifehacker.com/software/windows-vis...sage-254365.php
here's another link for the same thing
http://www.watchingthenet.com/how-to-reduc...em-restore.html

Is C: the only drive you have?
Have you used the Windows utility, Disk Cleanup?
Regards,
John