Iíve recently brought my desktop computer and I donít have much experience of using computer. All my application are open very slow and my c drive almost completely full. Iíve 80 gb hard disk and it shows only 5 gb hard disk remaining in my system, in which windows(20 gb), users(40 gb) occupy space, where is remaining 20 gb ? . I donít know whatís wrong with my computer. Are you have any idea where is the remaining 20 gb hard disk. Please tell me how should I resolve this issue. Please suggest me some solution to this. Please help me.