Disk space

We have a Windows 2003 R2 with a 12 GB OS partition.  The only other software installed on this is backup software.  We now have only 750Mb free on this drive. Adding up the sizes of all the folders on this drive only comes to about 8GB. Does anyone have any ideas what could be taking up the remaining space.
Thanks
ZbiebuAsked:
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Darius GhassemCommented:
Use this tool.

http://windirstat.info/

The tool will point out where the space is being allocated

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Lee W, MVPTechnology and Business Process AdvisorCommented:
Please see http://www.lwcomputing.com/tips/static/bootdrivesize.asp

I suspect you totaled the size of folders and forgot about your C:\ root where the pagefile is.
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ZbiebuAuthor Commented:
Many thanks
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Windows Server 2003

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