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Missing Space on C:\ drive

Greetings.  I have a Windows Server 2003, 32bit OS, on a remote server. When the the drive was partitioned, the C:\ drive only has 12G.  I'm down to 4 percent available space on it.  The trouble is, after looking through the the drive, I can only account for appox. 9G. Where could the other 3G be.  Is there a way to recover this space.  If I go to the properties of the drive, it looks like some space could be recovered if I compress files that haven't been used in awhile.  I would do this, but I don't know what the ramifications would be.  Any advice?
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a1785
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a1785
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2 Solutions
 
Aaron TomoskyTechnology ConsultantCommented:
Windirstat.
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steinmtoCommented:
Page File?  Did you enable the option to see hidden files and windows files?
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Darius GhassemCommented:
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DracoDanCommented:
System restore could be the problem if not the page file.  This is actually more likely the cause since your page file usually stays about the same, but system restore will grow with time.
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a1785Author Commented:
I'll look into it on Monday morning.  Thanks all.  I'll let you know.
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a1785Author Commented:
Okay.  I've had time to review your comments.  Page file is approx. 850MB in size, which leaves about 2GB unaccounted for.  Yes, I have invisibles viewable.  I'm curious about the Restore comment.  Is there a way to remove some of the restore points to release some of the space?
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a1785Author Commented:
I'm not sure.  I'll read your links.  Thanks,
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BillDLCommented:
It's not the default. System Restore would have to have been installed using Windows XP files, so I assume you would be aware of that.  I think DracoDan may not have spotted that you had Windows 2003 Server.
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a1785Author Commented:
I see.  Thanks Bill.  I'm am more familiar with user support and desktop repair.  Our Director of IT and system admin is no longer with the company, so I'm trying to limp along until we get someone or something else in place.  Wasn't aware that Servers don't generally have a system restore.  I'm sure that's probably why I didn't see it, right off the bat.  I will review your links.
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Darius GhassemCommented:
Download Windirstat you can then view what exactly is taking the space up
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a1785Author Commented:
Aaron mentioned that but wasn't sure what that was for or how to run it.  I'll look into it also.
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Darius GhassemCommented:
Shows you where the exactly the space is taken

http://windirstat.info/
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a1785Author Commented:
Thank you for the valuable information.  Though I had show hidden files checked, I did not have show system files checked.  I see now that the Page File is where the missing space is.  The recommended size I believe was 3040MB.  It is set at 2048MB and is using 850MB.  I would like to change the size to 1024MB.  So, do I just click Custom, change the size, and ok it? Does it require a reboot?  Other than the response slowing down if it needs more virtual RAM, what else should I be careful of?  Thanks again.
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Darius GhassemCommented:
Does require a reboot. You can have some performance problems and logging problems if you lower the page file to smaller then what your current physical memory is. I would recommend moving page file to another drive and remove  the page file from C:
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a1785Author Commented:
Overall Page file is at 10+G.  So, will system know to use from other drives if I just turn it off on C:?  Or is it now okay to drop it down to 1024MB on C: since the other drives are already set up with reserved space?
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Darius GhassemCommented:
Just remove it off C: the system will know where to go to work use page file
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