Operating system shows wrong size of Hard Disk's C drive?

I have an XP Operating System. When I open my windows explorer and show the listing of my hard disk drives. I have 80 GB hard disk and I partition it into 4 drives each get 20 GB space. In listing it show me 18.6 GB total size for C drive and 926 MB free space but when I go into C drive and select all the folders present in C drive and check its properties it show me around 10.3 GB size on disk. Why there is such a big difference in size only in C drive and for other drives it show me the correct result?

Operating system shows wrong size of Hard Disk's C drive?
Hidden files and folders and OS pagefile. Your drives are much too small to be useful. When you install anything, even if you install it to another partition, its' library files (maybe hundreds) and registry entries all get placed on the system drive under Windows. This means you can very soon stop the system as the drive fills up. You gain no advantage using partitions, as a virus infection can soon be transferred to other drives, and if the drive actually fails you have lost ALL the partitions. Also if you do a system drive re-install, even programs on the other drives will be lost, until you do the full re-install to recover the library files and registry.
Reply:Theres probably alot of hidden system files.
Reply:The sizes are correct


80GB does not mean 80Gb of space


Harddisk manufacturers count 1GB as 1000000000B


But in software calculation 1GB is less than that because 1KB is 1024B not 1000B


It is a conversion thing


So yr 80Gb is actually around 74GB usable space


Yr drive is ok
Reply:Well, I would suggest a disk defragment...





try that, if that doesn't help come back to yahoo...


and repost your results for me to more thoroughly understand.
Reply:Certain system files (such as your swap) will not show up in the total file size count... This explains the discrepancy.